diff --git a/glib/tests/slice.c b/glib/tests/slice.c
index b0ad3da66..f37826f3a 100644
--- a/glib/tests/slice.c
+++ b/glib/tests/slice.c
@@ -137,7 +137,7 @@ test_allocate (void)
 {
   GThread *threads[30];
   gint size;
-  gint i;
+  gsize i;
 
   for (i = 0; i < 30; i++)
     for (size = 1; size <= 4096; size++)