diff --git a/nb-api/src/main/java/io/nosqlbench/nb/api/errors/OpConfigError.java b/nb-api/src/main/java/io/nosqlbench/nb/api/errors/OpConfigError.java
index db2ad866b..0df6b1186 100644
--- a/nb-api/src/main/java/io/nosqlbench/nb/api/errors/OpConfigError.java
+++ b/nb-api/src/main/java/io/nosqlbench/nb/api/errors/OpConfigError.java
@@ -65,6 +65,6 @@ public class OpConfigError extends ActivityInitError {
             sb.append(" " + super.getMessage());
         }
 
-        return sb.toString();
+        return sb + super.getMessage();
     }
 }