diff --git a/glib/glib-init.c b/glib/glib-init.c
index 0032ee876..ceb93950e 100644
--- a/glib/glib-init.c
+++ b/glib/glib-init.c
@@ -25,6 +25,7 @@
 
 #include "gutils.h"     /* for GDebugKey */
 #include "gconstructor.h"
+#include "gmem.h"       /* for g_mem_gc_friendly */
 
 #include <string.h>
 #include <stdlib.h>
diff --git a/glib/glib-init.h b/glib/glib-init.h
index 016465fbc..5b150a402 100644
--- a/glib/glib-init.h
+++ b/glib/glib-init.h
@@ -26,7 +26,6 @@
 
 extern GLogLevelFlags g_log_always_fatal;
 extern GLogLevelFlags g_log_msg_prefix;
-GLIB_VAR gboolean g_mem_gc_friendly;
 
 #ifdef G_OS_WIN32
 #include <windows.h>