diff --git a/libs/antlr-2.7.7/src/String.cpp b/libs/antlr-2.7.7/src/String.cpp
index bb955191..e07b5fb5 100644
--- a/libs/antlr-2.7.7/src/String.cpp
+++ b/libs/antlr-2.7.7/src/String.cpp
@@ -38,7 +38,7 @@ ANTLR_USE_NAMESPACE(std)string operator+( const ANTLR_USE_NAMESPACE(std)string&
 ANTLR_USE_NAMESPACE(std)string operator+( const ANTLR_USE_NAMESPACE(std)string& lhs, size_t rhs )
 {
 	char tmp[100];
-	sprintf(tmp,"%u",rhs);
+	sprintf(tmp,"%zu",rhs);
 	return lhs+tmp;
 }