diff --git a/src/MiniFB_internal.h b/src/MiniFB_internal.h
index 7ba4062..c0c3192 100755
--- a/src/MiniFB_internal.h
+++ b/src/MiniFB_internal.h
@@ -18,7 +18,6 @@ extern "C" {
 #endif
 
     extern short int g_keycodes[512];
-    void init_keycodes(void);
     void keyboard_default(struct mfb_window *window, mfb_key key, mfb_key_mod mod, bool isPressed);
 
 #if defined(__cplusplus)
diff --git a/src/macosx/MacMiniFB.m b/src/macosx/MacMiniFB.m
index 8410f74..3b04db8 100644
--- a/src/macosx/MacMiniFB.m
+++ b/src/macosx/MacMiniFB.m
@@ -15,6 +15,7 @@
 #include <MiniFB_internal.h>
 #include <MiniFB_enums.h>
 
+//-------------------------------------
 void init_keycodes();
 
 //-------------------------------------
diff --git a/src/wayland/WaylandMiniFB.c b/src/wayland/WaylandMiniFB.c
index ade49b3..1151433 100644
--- a/src/wayland/WaylandMiniFB.c
+++ b/src/wayland/WaylandMiniFB.c
@@ -19,6 +19,8 @@
 
 #include <sys/mman.h>
 
+void init_keycodes();
+
 static void 
 destroy_window_data(SWindowData *window_data) 
 {
diff --git a/src/windows/WinMiniFB.c b/src/windows/WinMiniFB.c
index 3916da2..1c94c70 100644
--- a/src/windows/WinMiniFB.c
+++ b/src/windows/WinMiniFB.c
@@ -11,6 +11,8 @@ long    s_window_style = WS_POPUP | WS_SYSMENU | WS_CAPTION;
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
+void init_keycodes();
+
 uint32_t translate_mod();
 mfb_key  translate_key(unsigned int wParam, unsigned long lParam);
 void     destroy_window_data(SWindowData *window_data);
diff --git a/src/x11/X11MiniFB.c b/src/x11/X11MiniFB.c
index b6e7117..9676366 100644
--- a/src/x11/X11MiniFB.c
+++ b/src/x11/X11MiniFB.c
@@ -15,6 +15,8 @@
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
+void init_keycodes(SWindowData_X11 *window_data_x11);
+
 extern void 
 stretch_image(uint32_t *srcImage, uint32_t srcX, uint32_t srcY, uint32_t srcWidth, uint32_t srcHeight, uint32_t srcPitch,
               uint32_t *dstImage, uint32_t dstX, uint32_t dstY, uint32_t dstWidth, uint32_t dstHeight, uint32_t dstPitch);