diff --git a/src/vendor_qti_ims_radio.c b/src/vendor_qti_ims_radio.c
index fa232df..e41e9a9 100644
--- a/src/vendor_qti_ims_radio.c
+++ b/src/vendor_qti_ims_radio.c
@@ -278,7 +278,7 @@ VendorQtiImsRadio* vendor_qti_ims_radio_new(const char* dev, const char* name)
 }
 
 gulong vendor_qti_ims_radio_add_reg_state_changed_handler(VendorQtiImsRadio* self,
-                                                            
+    void* user_data
     ){
 
 }