diff --git a/apps/openmw-mp/Script/CTypes.h b/apps/openmw-mp/Script/CTypes.h
index a525d9755..c3197e715 100644
--- a/apps/openmw-mp/Script/CTypes.h
+++ b/apps/openmw-mp/Script/CTypes.h
@@ -25,4 +25,6 @@ typedef unsigned int PlayerId;
 
 #if !(defined __cplusplus || defined __genffi__)
 typedef uint8_t bool;
+#define true 1
+#define false 0
 #endif