diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
index d18d1df..acc2ead 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewnotes/RefUpdateListener.java
@@ -114,7 +114,7 @@
               })
           .call();
     } catch (RestApiException | UpdateException x) {
-      logger.atSevere().withCause(x).log(x.getMessage());
+      logger.atSevere().withCause(x).log("%s", x.getMessage());
     }
   }
 }