Index: src/OFString.h
==================================================================
--- src/OFString.h
+++ src/OFString.h
@@ -18,10 +18,16 @@
 # define __STDC_LIMIT_MACROS
 #endif
 #ifndef __STDC_CONSTANT_MACROS
 # define __STDC_CONSTANT_MACROS
 #endif
+
+#import "objfw-defs.h"
+
+#ifdef OF_HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
 
 #include <stdarg.h>
 #include <stdint.h>
 
 #import "OFObject.h"