diff --git a/components/gfx/platform/macos/font.rs b/components/gfx/platform/macos/font.rs
index beb8f9f4f2f..b14d30e6cca 100644
--- a/components/gfx/platform/macos/font.rs
+++ b/components/gfx/platform/macos/font.rs
@@ -247,7 +247,7 @@ impl FontHandleMethods for FontHandle {
             return None;
         }
 
-        assert!(glyphs[0] != 0); // FIXME: error handling
+        assert_ne!(glyphs[0], 0); // FIXME: error handling
         return Some(glyphs[0] as GlyphId);
     }