diff --git a/include/hardware/audio.h b/include/hardware/audio.h
index 3b734f77..b49dce62 100644
--- a/include/hardware/audio.h
+++ b/include/hardware/audio.h
@@ -682,7 +682,7 @@ static inline int audio_hw_device_open(const struct hw_module_t* module,
                                        struct audio_hw_device** device)
 {
     return module->methods->open(module, AUDIO_HARDWARE_INTERFACE,
-                                 (struct hw_device_t**)device);
+                                 TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int audio_hw_device_close(struct audio_hw_device* device)
diff --git a/include/hardware/fb.h b/include/hardware/fb.h
index 9df94165..65720a39 100644
--- a/include/hardware/fb.h
+++ b/include/hardware/fb.h
@@ -160,7 +160,7 @@ typedef struct framebuffer_device_t {
 static inline int framebuffer_open(const struct hw_module_t* module,
         struct framebuffer_device_t** device) {
     return module->methods->open(module,
-            GRALLOC_HARDWARE_FB0, (struct hw_device_t**)device);
+            GRALLOC_HARDWARE_FB0, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int framebuffer_close(struct framebuffer_device_t* device) {
diff --git a/include/hardware/gralloc.h b/include/hardware/gralloc.h
index 779915c8..3d5b91fa 100644
--- a/include/hardware/gralloc.h
+++ b/include/hardware/gralloc.h
@@ -372,7 +372,7 @@ typedef struct alloc_device_t {
 static inline int gralloc_open(const struct hw_module_t* module, 
         struct alloc_device_t** device) {
     return module->methods->open(module, 
-            GRALLOC_HARDWARE_GPU0, (struct hw_device_t**)device);
+            GRALLOC_HARDWARE_GPU0, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int gralloc_close(struct alloc_device_t* device) {
diff --git a/include/hardware/gralloc1.h b/include/hardware/gralloc1.h
index 58c0e334..a1a2d696 100644
--- a/include/hardware/gralloc1.h
+++ b/include/hardware/gralloc1.h
@@ -290,7 +290,7 @@ typedef struct gralloc1_device {
 static inline int gralloc1_open(const struct hw_module_t* module,
         gralloc1_device_t** device) {
     return module->methods->open(module, GRALLOC_HARDWARE_MODULE_ID,
-            (struct hw_device_t**) device);
+            TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int gralloc1_close(gralloc1_device_t* device) {
diff --git a/include/hardware/hardware.h b/include/hardware/hardware.h
index 74f57aa4..bf076f6c 100644
--- a/include/hardware/hardware.h
+++ b/include/hardware/hardware.h
@@ -201,6 +201,12 @@ typedef struct hw_device_t {
 
 } hw_device_t;
 
+#ifdef __cplusplus
+#define TO_HW_DEVICE_T_OPEN(x) reinterpret_cast<struct hw_device_t**>(x)
+#else
+#define TO_HW_DEVICE_T_OPEN(x) (struct hw_device_t**)(x)
+#endif
+
 /**
  * Name of the hal_module_info
  */
diff --git a/include/hardware/hdmi_cec.h b/include/hardware/hdmi_cec.h
index ab70f92e..aa06384e 100644
--- a/include/hardware/hdmi_cec.h
+++ b/include/hardware/hdmi_cec.h
@@ -417,7 +417,7 @@ typedef struct hdmi_cec_device {
 static inline int hdmi_cec_open(const struct hw_module_t* module,
         struct hdmi_cec_device** device) {
     return module->methods->open(module,
-            HDMI_CEC_HARDWARE_INTERFACE, (struct hw_device_t**)device);
+            HDMI_CEC_HARDWARE_INTERFACE, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int hdmi_cec_close(struct hdmi_cec_device* device) {
diff --git a/include/hardware/hwcomposer.h b/include/hardware/hwcomposer.h
index 61218bba..7eca7c1b 100644
--- a/include/hardware/hwcomposer.h
+++ b/include/hardware/hwcomposer.h
@@ -783,7 +783,7 @@ typedef struct hwc_composer_device_1 {
 static inline int hwc_open_1(const struct hw_module_t* module,
         hwc_composer_device_1_t** device) {
     return module->methods->open(module,
-            HWC_HARDWARE_COMPOSER, (struct hw_device_t**)device);
+            HWC_HARDWARE_COMPOSER, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int hwc_close_1(hwc_composer_device_1_t* device) {
diff --git a/include/hardware/hwcomposer2.h b/include/hardware/hwcomposer2.h
index f4f6093d..35eedb08 100644
--- a/include/hardware/hwcomposer2.h
+++ b/include/hardware/hwcomposer2.h
@@ -740,7 +740,7 @@ typedef struct hwc2_device {
 static inline int hwc2_open(const struct hw_module_t* module,
         hwc2_device_t** device) {
     return module->methods->open(module, HWC_HARDWARE_COMPOSER,
-            (struct hw_device_t**) device);
+            TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int hwc2_close(hwc2_device_t* device) {
diff --git a/include/hardware/keymaster0.h b/include/hardware/keymaster0.h
index f020e5b1..52ac64b6 100644
--- a/include/hardware/keymaster0.h
+++ b/include/hardware/keymaster0.h
@@ -134,7 +134,7 @@ static inline int keymaster0_open(const struct hw_module_t* module,
         keymaster0_device_t** device)
 {
     int rc = module->methods->open(module, KEYSTORE_KEYMASTER,
-            (struct hw_device_t**) device);
+            TO_HW_DEVICE_T_OPEN(device));
 
     return rc;
 }
diff --git a/include/hardware/keymaster1.h b/include/hardware/keymaster1.h
index afd202c0..99693806 100644
--- a/include/hardware/keymaster1.h
+++ b/include/hardware/keymaster1.h
@@ -536,7 +536,7 @@ typedef struct keymaster1_device keymaster1_device_t;
 /* Convenience API for opening and closing keymaster devices */
 
 static inline int keymaster1_open(const struct hw_module_t* module, keymaster1_device_t** device) {
-    return module->methods->open(module, KEYSTORE_KEYMASTER, (struct hw_device_t**)device);
+    return module->methods->open(module, KEYSTORE_KEYMASTER, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int keymaster1_close(keymaster1_device_t* device) {
diff --git a/include/hardware/keymaster2.h b/include/hardware/keymaster2.h
index 565ad2e3..f1993f88 100644
--- a/include/hardware/keymaster2.h
+++ b/include/hardware/keymaster2.h
@@ -420,7 +420,7 @@ typedef struct keymaster2_device keymaster2_device_t;
 /* Convenience API for opening and closing keymaster devices */
 
 static inline int keymaster2_open(const struct hw_module_t* module, keymaster2_device_t** device) {
-    return module->methods->open(module, KEYSTORE_KEYMASTER, (struct hw_device_t**)device);
+    return module->methods->open(module, KEYSTORE_KEYMASTER, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int keymaster2_close(keymaster2_device_t* device) {
diff --git a/include/hardware/local_time_hal.h b/include/hardware/local_time_hal.h
index 946e7997..1bbbf116 100644
--- a/include/hardware/local_time_hal.h
+++ b/include/hardware/local_time_hal.h
@@ -109,7 +109,7 @@ static inline int local_time_hw_device_open(
         struct local_time_hw_device** device)
 {
     return module->methods->open(module, LOCAL_TIME_HARDWARE_INTERFACE,
-                                 (struct hw_device_t**)device);
+                                 TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int local_time_hw_device_close(struct local_time_hw_device* device)
diff --git a/include/hardware/nvram.h b/include/hardware/nvram.h
index 859ea471..0654afef 100644
--- a/include/hardware/nvram.h
+++ b/include/hardware/nvram.h
@@ -326,7 +326,7 @@ typedef struct nvram_device nvram_device_t;
 static inline int nvram_open(const struct hw_module_t* module,
                              nvram_device_t** device) {
     return module->methods->open(module, NVRAM_HARDWARE_DEVICE_ID,
-                                 (struct hw_device_t**)device);
+                                 TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int nvram_close(nvram_device_t* device) {
diff --git a/include/hardware/radio.h b/include/hardware/radio.h
index 145deb57..413f4133 100644
--- a/include/hardware/radio.h
+++ b/include/hardware/radio.h
@@ -285,7 +285,7 @@ static inline int radio_hw_device_open(const struct hw_module_t* module,
                                        struct radio_hw_device** device)
 {
     return module->methods->open(module, RADIO_HARDWARE_DEVICE,
-                                 (struct hw_device_t**)device);
+                                 TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int radio_hw_device_close(const struct radio_hw_device* device)
diff --git a/include/hardware/sensors.h b/include/hardware/sensors.h
index a883960c..d98c623f 100644
--- a/include/hardware/sensors.h
+++ b/include/hardware/sensors.h
@@ -1395,7 +1395,7 @@ typedef struct sensors_poll_device_1 {
 static inline int sensors_open(const struct hw_module_t* module,
         struct sensors_poll_device_t** device) {
     return module->methods->open(module,
-            SENSORS_HARDWARE_POLL, (struct hw_device_t**)device);
+            SENSORS_HARDWARE_POLL, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int sensors_close(struct sensors_poll_device_t* device) {
@@ -1405,7 +1405,7 @@ static inline int sensors_close(struct sensors_poll_device_t* device) {
 static inline int sensors_open_1(const struct hw_module_t* module,
         sensors_poll_device_1_t** device) {
     return module->methods->open(module,
-            SENSORS_HARDWARE_POLL, (struct hw_device_t**)device);
+            SENSORS_HARDWARE_POLL, TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int sensors_close_1(sensors_poll_device_1_t* device) {
diff --git a/include/hardware/sound_trigger.h b/include/hardware/sound_trigger.h
index e1abbc9e..d7828acd 100644
--- a/include/hardware/sound_trigger.h
+++ b/include/hardware/sound_trigger.h
@@ -124,7 +124,7 @@ static inline int sound_trigger_hw_device_open(const struct hw_module_t* module,
                                        struct sound_trigger_hw_device** device)
 {
     return module->methods->open(module, SOUND_TRIGGER_HARDWARE_INTERFACE,
-                                 (struct hw_device_t**)device);
+                                 TO_HW_DEVICE_T_OPEN(device));
 }
 
 static inline int sound_trigger_hw_device_close(struct sound_trigger_hw_device* device)
diff --git a/include/hardware/vibrator.h b/include/hardware/vibrator.h
index 200adf09..361085f4 100644
--- a/include/hardware/vibrator.h
+++ b/include/hardware/vibrator.h
@@ -65,7 +65,7 @@ typedef struct vibrator_device {
 
 static inline int vibrator_open(const struct hw_module_t* module, vibrator_device_t** device)
 {
-    return module->methods->open(module, VIBRATOR_DEVICE_ID_MAIN, (struct hw_device_t**)device);
+    return module->methods->open(module, VIBRATOR_DEVICE_ID_MAIN, TO_HW_DEVICE_T_OPEN(device));
 }
 
 __END_DECLS