diff --git a/rewind.c b/rewind.c
index 8c329c247b..a6c2c44d84 100644
--- a/rewind.c
+++ b/rewind.c
@@ -658,7 +658,7 @@ bool state_manager_frame_is_reversed(void)
    return frame_is_reversed;
 }
 
-void state_manager_set_frame_is_reversed(bool value)
+static void state_manager_set_frame_is_reversed(bool value)
 {
    frame_is_reversed = value;
 }
diff --git a/rewind.h b/rewind.h
index 8f3ad9994d..f7cdaf201e 100644
--- a/rewind.h
+++ b/rewind.h
@@ -36,8 +36,6 @@ void init_rewind(void);
 
 bool state_manager_frame_is_reversed(void);
 
-void state_manager_set_frame_is_reversed(bool value);
-
 void state_manager_event_deinit(void);
 
 /**