diff --git a/tests/virfilewrapper.c b/tests/virfilewrapper.c
index 1d1d182708..3fd7f7aa8f 100644
--- a/tests/virfilewrapper.c
+++ b/tests/virfilewrapper.c
@@ -267,7 +267,7 @@ int open(const char *path, int flags, ...)
      */
     if (flags & O_CREAT) {
         va_start(ap, flags);
-        mode = va_arg(ap, mode_t);
+        mode = (mode_t) va_arg(ap, int);
         va_end(ap);
     }
 
diff --git a/tests/virusbmock.c b/tests/virusbmock.c
index f430a2edad..12083e2362 100644
--- a/tests/virusbmock.c
+++ b/tests/virusbmock.c
@@ -101,7 +101,7 @@ int open(const char *pathname, int flags, ...)
      */
     if (flags & O_CREAT) {
         va_start(ap, flags);
-        mode = va_arg(ap, mode_t);
+        mode = (mode_t) va_arg(ap, int);
         va_end(ap);
     }