diff --git a/packages/compiler-dom/src/errors.ts b/packages/compiler-dom/src/errors.ts
index b47624840ab..faf6fb56441 100644
--- a/packages/compiler-dom/src/errors.ts
+++ b/packages/compiler-dom/src/errors.ts
@@ -42,7 +42,7 @@ if (__TEST__) {
   if (DOMErrorCodes.X_V_HTML_NO_EXPRESSION < ErrorCodes.__EXTEND_POINT__) {
     throw new Error(
       `DOMErrorCodes need to be updated to ${
-        ErrorCodes.__EXTEND_POINT__ + 1
+        ErrorCodes.__EXTEND_POINT__
       } to match extension point from core ErrorCodes.`,
     )
   }
diff --git a/packages/compiler-ssr/src/errors.ts b/packages/compiler-ssr/src/errors.ts
index e4fd505d282..bea0774215e 100644
--- a/packages/compiler-ssr/src/errors.ts
+++ b/packages/compiler-ssr/src/errors.ts
@@ -29,7 +29,7 @@ if (__TEST__) {
   if (SSRErrorCodes.X_SSR_UNSAFE_ATTR_NAME < DOMErrorCodes.__EXTEND_POINT__) {
     throw new Error(
       `SSRErrorCodes need to be updated to ${
-        DOMErrorCodes.__EXTEND_POINT__ + 1
+        DOMErrorCodes.__EXTEND_POINT__
       } to match extension point from core DOMErrorCodes.`,
     )
   }