diff --git a/zsnes/src/uic.c b/zsnes/src/uic.c
index d27d0354..1e4cfa6e 100644
--- a/zsnes/src/uic.c
+++ b/zsnes/src/uic.c
@@ -20,9 +20,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #include <stdlib.h>
 
 //C++ style code in C
-#define bool unsigned char
-#define true 1
-#define false 0
+enum bool { false, true };
 
 extern void outofmemory();
 extern unsigned char *spc7110romptr;