diff --git a/glib/tests/protocol.c b/glib/tests/protocol.c
index f1e969af3..27ebd99be 100644
--- a/glib/tests/protocol.c
+++ b/glib/tests/protocol.c
@@ -246,7 +246,7 @@ test_error (void)
           "/glib/testing/protocol/critical",
           "/glib/testing/protocol/error"
   };
-  gint i;
+  gsize i;
   int             messages = 0;
 
   for (i = 0; i < G_N_ELEMENTS (tests); i++)