diff --git a/Headers/Additions/GNUstepBase/GSObjCRuntime.h b/Headers/Additions/GNUstepBase/GSObjCRuntime.h
index f20f0e8d8..62819cb9b 100644
--- a/Headers/Additions/GNUstepBase/GSObjCRuntime.h
+++ b/Headers/Additions/GNUstepBase/GSObjCRuntime.h
@@ -33,6 +33,7 @@
 #include <GNUstepBase/GSVersionMacros.h>
 #include <GNUstepBase/GSConfig.h>
 
+#include <stdio.h>
 #include <objc/objc.h>
 #include <objc/objc-api.h>