diff --git a/hw/xfree86/os-support/shared/libc_wrapper.c b/hw/xfree86/os-support/shared/libc_wrapper.c
index 1663893d9..fb1363ab2 100644
--- a/hw/xfree86/os-support/shared/libc_wrapper.c
+++ b/hw/xfree86/os-support/shared/libc_wrapper.c
@@ -89,8 +89,8 @@ extern int mmapFd;
 #include <stdlib.h>
 #endif
 
-#define NEED_XF86_TYPES
-#define NEED_XF86_PROTOTYPES
+#define NEED_XF86_TYPES 1
+#define NEED_XF86_PROTOTYPES 1
 #define DONT_DEFINE_WRAPPERS
 #include "xf86_ansic.h"