diff --git a/src/sys/include/sys/types.h b/src/sys/include/sys/types.h
index 668287d..2dbbc2c 100644
--- a/src/sys/include/sys/types.h
+++ b/src/sys/include/sys/types.h
@@ -75,9 +75,13 @@
 
 #ifndef NOBOOL
 #ifndef __cplusplus
+typedef enum {FALSE=0,TRUE=1}bool;
+#endif
+#else
+#ifndef __cplusplus
 #define FALSE 0
 #define TRUE  1
-typedef enum {FALSE=0,TRUE=1}bool;
+typedef int bool;
 #endif
 #endif