diff --git a/OpenUDID.m b/OpenUDID.m
index 3100944..aab285c 100644
--- a/OpenUDID.m
+++ b/OpenUDID.m
@@ -188,6 +188,8 @@ + (NSString*) _generateFreshOpenUDID {
                 result[8], result[9], result[10], result[11],
                 result[12], result[13], result[14], result[15],
                      (NSUInteger)(arc4random() % NSUIntegerMax)];  
+
+        CFRelease(cfstring);
     }
     
     // Call to other developers in the Open Source community: