diff --git a/src/main/java/org/tikv/common/region/RegionStoreClient.java b/src/main/java/org/tikv/common/region/RegionStoreClient.java
index 1c0632d5b78..db54e581327 100644
--- a/src/main/java/org/tikv/common/region/RegionStoreClient.java
+++ b/src/main/java/org/tikv/common/region/RegionStoreClient.java
@@ -975,7 +975,7 @@ private void rawCompareAndSetHelper(
       throws RawCASConflictException {
     if (resp == null) {
       this.regionManager.onRequestFail(region);
-      throw new TiClientInternalException("RawPutResponse failed without a cause");
+      throw new TiClientInternalException("RawCASResponse failed without a cause");
     }
     String error = resp.getError();
     if (!error.isEmpty()) {