1 files changed, 1 insertions, 1 deletions
diff --git a/abi-check-plugin/src/main/java/com/yahoo/abicheck/mojo/AbiCheck.java b/abi-check-plugin/src/main/java/com/yahoo/abicheck/mojo/AbiCheck.java
index a09e23bbe9e..c5452ecdde3 100644
--- a/abi-check-plugin/src/main/java/com/yahoo/abicheck/mojo/AbiCheck.java
+++ b/abi-check-plugin/src/main/java/com/yahoo/abicheck/mojo/AbiCheck.java
@@ -192,7 +192,7 @@ public class AbiCheck extends AbstractMojo {
       } else {
         Map<String, JavaClassSignature> abiSpec = readSpec(specFile);
         if (!compareSignatures(abiSpec, signatures, getLog())) {
-          throw new MojoFailureException("ABI spec mismatch");
+          throw new MojoFailureException("ABI spec mismatch. To update run 'mvn package -Dabicheck.writeSpec'");
         }
       }
     } catch (IOException e) {