diff --git a/include/Mw/LowLevel/GDI.h b/include/Mw/LowLevel/GDI.h
index a316779..4eeeb8d 100644
--- a/include/Mw/LowLevel/GDI.h
+++ b/include/Mw/LowLevel/GDI.h
@@ -38,4 +38,6 @@ struct _MwLLGDIPixmap {
 	HBITMAP	 hMask2;
 };
 
+MWDECL int MwLLGDICallInit(void);
+
 #endif
diff --git a/include/Mw/LowLevel/X11.h b/include/Mw/LowLevel/X11.h
index eef85ae..fde208e 100644
--- a/include/Mw/LowLevel/X11.h
+++ b/include/Mw/LowLevel/X11.h
@@ -68,4 +68,6 @@ struct _MwLLX11Pixmap {
 	XImage*	       mask;
 };
 
+MWDECL int MwLLX11CallInit(void);
+
 #endif
diff --git a/src/core.c b/src/core.c
index e0d1c34..77c6d9a 100644
--- a/src/core.c
+++ b/src/core.c
@@ -685,12 +685,6 @@ MwWidget MwGetParent(MwWidget handle) {
 }
 
 typedef int (*call_t)(void);
-#ifdef USE_X11
-int MwLLX11CallInit(void);
-#endif
-#ifdef USE_GDI
-int MwLLGDICallInit(void);
-#endif
 int MwLibraryInit(void) {
 	call_t calls[] = {
 #ifdef USE_X11