diff --git a/utils/scan-build b/utils/scan-build
index 9d4f75986f..fd196ba67c 100755
--- a/utils/scan-build
+++ b/utils/scan-build
@@ -100,7 +100,8 @@ my %AnalysesDefaultEnabled = (
   '-warn-dead-stores' => 1,
   '-checker-cfref' => 1,
   '-warn-objc-methodsigs' => 1,
-  '-warn-objc-missing-dealloc' => 1
+  '-warn-objc-missing-dealloc' => 1,
+  '-warn-objc-unused-ivars' => 1
 );
 
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