diff --git a/include/wx/gsocket.h b/include/wx/gsocket.h
index 10eb21f79e..e5a9070209 100644
--- a/include/wx/gsocket.h
+++ b/include/wx/gsocket.h
@@ -18,7 +18,7 @@
 #include <sys/types.h>
 
 #if !defined(__cplusplus)
-typedef int bool;
+typedef unsigned int bool;
 #endif
 
 #ifndef TRUE