diff --git a/temporal-sdk/src/main/java/io/temporal/client/WorkflowException.java b/temporal-sdk/src/main/java/io/temporal/client/WorkflowException.java
index 3feb5f489..33b0d9a16 100644
--- a/temporal-sdk/src/main/java/io/temporal/client/WorkflowException.java
+++ b/temporal-sdk/src/main/java/io/temporal/client/WorkflowException.java
@@ -39,6 +39,6 @@ private static String getMessage(WorkflowExecution execution, String workflowTyp
         + execution.getWorkflowId()
         + "', runId='"
         + execution.getRunId()
-        + (workflowType == null ? "" : "', workflowType='" + workflowType + '\'');
+        + (workflowType == null ? "'" : "', workflowType='" + workflowType + '\'');
   }
 }