diff --git a/spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/encryption/EncryptionController.java b/spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/encryption/EncryptionController.java
index 147f3158..96244743 100644
--- a/spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/encryption/EncryptionController.java
+++ b/spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/encryption/EncryptionController.java
@@ -136,7 +136,8 @@ public class EncryptionController {
 		}
 		catch (IllegalArgumentException | IllegalStateException e) {
 			if (logger.isErrorEnabled()) {
-				logger.error("Cannot decrypt key:" + name + ", value:" + data, e);
+				logger.error("Cannot decrypt key:" + name + ", value:" + data +
+					", Please verify if encrypt.key is set correctly", e);
 			}
 			throw new InvalidCipherException();
 		}