diff --git a/lib/SimpleSAML/Utils/Crypto.php b/lib/SimpleSAML/Utils/Crypto.php
index 3dc695980bbb602d3b96dbfd5107c3fe3448eee4..17dcd81f6dfcd5d9ecb9a413a1ccf071b10a95b0 100644
--- a/lib/SimpleSAML/Utils/Crypto.php
+++ b/lib/SimpleSAML/Utils/Crypto.php
@@ -53,8 +53,8 @@ class Crypto
             }
         }
 
-        throw new \SimpleSAML_Error_Exception("Failed to decrypt ciphertext \"".
-            base64_encode($ciphertext).'", hmac: "'.base64_encode($hmac).'", iv: "'.base64_encode($iv).'"');
+        throw new \SimpleSAML_Error_Exception("Failed to decrypt ciphertext \"".bin2hex($ciphertext).
+            '", hmac: "'.bin2hex($hmac).'", iv: "'.bin2hex($iv).'", msg: "'.bin2hex($msg).'"');
     }