diff --git a/src/interface.c b/src/interface.c
index ac1bdf8..280c885 100644
--- a/src/interface.c
+++ b/src/interface.c
@@ -45,7 +45,7 @@ GroundValue groundCreateValue(GroundValueType type, ...) {
 
     switch (type) {
         case INT: {
-            return createIntGroundValue(va_arg(args, int));
+            return createIntGroundValue(va_arg(args, int64_t));
             break;
         }
         case DOUBLE: {