diff --git a/src/main/java/org/apache/rat/tentacles/Deauthorize.java b/src/main/java/org/apache/rat/tentacles/Deauthorize.java
index 6e096f4..4e49c1e 100644
--- a/src/main/java/org/apache/rat/tentacles/Deauthorize.java
+++ b/src/main/java/org/apache/rat/tentacles/Deauthorize.java
@@ -99,8 +99,11 @@
     }
 
     private static boolean not(boolean b, String message, Object... details) {
-        System.err.printf(message, details);
-        System.err.println();
+        b=!b;
+        if (b) {
+            System.err.printf(message, details);
+            System.err.println();
+        }
         return b;
     }
 }