diff --git a/ruamoko/include/runtime.h b/ruamoko/include/runtime.h
index ac1c56631..731b52b9a 100644
--- a/ruamoko/include/runtime.h
+++ b/ruamoko/include/runtime.h
@@ -5,7 +5,7 @@
 #ifndef __ruamoko_runtime_h_
 #define __ruamoko_runtime_h_
 
-#define INT_MAX		2147483648
+#define INT_MAX		2147483647
 #define INT_MIN		(-INT_MAX - 1)
 
 #define UINT_MAX 	4294967295U