diff --git a/gb.db.mysql/src/main.c b/gb.db.mysql/src/main.c
index 78dec8d..5438712 100644
--- a/gb.db.mysql/src/main.c
+++ b/gb.db.mysql/src/main.c
@@ -31,6 +31,10 @@
 
 #include <mysql.h>
 
+#if defined(bool) && !defined(my_bool)
+#define my_bool bool
+#endif
+
 #include "gb.db.proto.h"
 #include "main.h"