diff --git a/power-845.c b/power-845.c
index 9fcd4ef..0138e26 100644
--- a/power-845.c
+++ b/power-845.c
@@ -180,9 +180,6 @@ static int process_video_encode_hint(void* metadata) {
     return HINT_NONE;
 }
 
-/* Declare function before use */
-void interaction(int duration, int num_args, int opt_list[]);
-
 int power_hint_override(power_hint_t hint, void* data) {
     int ret_val = HINT_NONE;
     switch (hint) {
diff --git a/power-common.c b/power-common.c
index 3119fdf..8d7df69 100644
--- a/power-common.c
+++ b/power-common.c
@@ -64,9 +64,6 @@ int __attribute__((weak)) power_hint_override(power_hint_t hint, void* data) {
     return HINT_NONE;
 }
 
-/* Declare function before use */
-void interaction(int duration, int num_args, int opt_list[]);
-
 void power_hint(power_hint_t hint, void* data) {
     /* Check if this hint has been overridden. */
     if (power_hint_override(hint, data) == HINT_HANDLED) {
diff --git a/power-msmnile.c b/power-msmnile.c
index b286533..3820d50 100644
--- a/power-msmnile.c
+++ b/power-msmnile.c
@@ -43,6 +43,7 @@
 #include <log/log.h>
 
 #include "power-common.h"
+#include "utils.h"
 
 int set_interactive_override(int on) {
     static int set_i_count = 0;
@@ -53,8 +54,6 @@ int set_interactive_override(int on) {
     return HINT_HANDLED;
 }
 
-void interaction(int duration, int num_args, int opt_list[]);
-
 int power_hint_override(power_hint_t hint, void* data) {
     int ret_val = HINT_NONE;
     switch (hint) {
diff --git a/utils.h b/utils.h
index 5bbbdb2..ffad091 100644
--- a/utils.h
+++ b/utils.h
@@ -43,6 +43,7 @@ void perform_hint_action(int hint_id, int resource_values[], int num_resources);
 void undo_hint_action(int hint_id);
 void undo_initial_hint_action();
 void release_request(int lock_handle);
+void interaction(int duration, int num_args, int opt_list[]);
 int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[]);
 int perf_hint_enable(int hint_id, int duration);
 PropVal perf_get_property(const char* prop, const char* def_val);