diff --git a/glib/glib-init.c b/glib/glib-init.c
index 99917e484..8a7224e81 100644
--- a/glib/glib-init.c
+++ b/glib/glib-init.c
@@ -141,6 +141,9 @@ G_STATIC_ASSERT (sizeof (gintptr) == sizeof (intptr_t));
 G_STATIC_ASSERT (sizeof (guintptr) == sizeof (uintptr_t));
 G_STATIC_ASSERT (G_ALIGNOF (gintptr) == G_ALIGNOF (intptr_t));
 G_STATIC_ASSERT (G_ALIGNOF (guintptr) == G_ALIGNOF (uintptr_t));
+/* True by definition */
+G_STATIC_ASSERT (sizeof (gintptr) >= sizeof (void *));
+G_STATIC_ASSERT (sizeof (guintptr) >= sizeof (void *));
 
 G_STATIC_ASSERT (sizeof (gint8) == sizeof (int8_t));
 G_STATIC_ASSERT (sizeof (guint8) == sizeof (uint8_t));