diff --git a/lib/nimbase.h b/lib/nimbase.h
index cc0419f55..11278ccd2 100755
--- a/lib/nimbase.h
+++ b/lib/nimbase.h
@@ -331,6 +331,8 @@ typedef long long int NI64;
 typedef unsigned int NU32;
 #endif
 
+extern NI nim_program_result;
+
 typedef float NF32;
 typedef double NF64;
 typedef double NF;