diff --git a/libvncserver/main.cpp b/libvncserver/main.cpp
index a07402a..bc90329 100644
--- a/libvncserver/main.cpp
+++ b/libvncserver/main.cpp
@@ -21,7 +21,7 @@ extern "C" {
 
 	#ifndef false
 	#define false 0
-	#define true -1
+	#define true 1
 	#endif
 
 	#ifdef LIBVNCSERVER_HAVE_SYS_TYPES_H