--- xnu/xnu-4570.41.2/libkern/c++/OSSet.cpp
+++ xnu/xnu-3248.30.4/libkern/c++/OSSet.cpp
@@ -156,10 +156,9 @@
 
 void OSSet::free()
 {
-    if (members) {
-        (void) members->super::setOptions(0, kImmutable);
+    (void) members->super::setOptions(0, kImmutable);
+    if (members)
         members->release();
-    }
 
     super::free();
 }