diff --git a/src/engine/helper/HL_VariantMap.cpp b/src/engine/helper/HL_VariantMap.cpp
index 49dee41d..4fba1045 100644
--- a/src/engine/helper/HL_VariantMap.cpp
+++ b/src/engine/helper/HL_VariantMap.cpp
@@ -299,7 +299,7 @@ std::string Variant::asStdString() const
     return buffer;
 
   case VTYPE_INT64:
-    sprintf(buffer, "%" PRId64, mInt64);
+    sprintf(buffer, "%lli", mInt64);
     return buffer;
 
   case VTYPE_BOOL: