diff --git a/build/azure-pipelines/publish-types/check-version.ts b/build/azure-pipelines/publish-types/check-version.ts
index 2c730889112fa..137e535353a4c 100644
--- a/build/azure-pipelines/publish-types/check-version.ts
+++ b/build/azure-pipelines/publish-types/check-version.ts
@@ -35,9 +35,9 @@ function isValidTag(t: string) {
 		return false;
 	}
 
-	if (parseInt(major, 10) === NaN || parseInt(minor, 10) === NaN) {
+	if (isNaN(parseInt(major, 10)) || isNaN(parseInt(minor, 10))) {
 		return false;
 	}
 
 	return true;
-}
\ No newline at end of file
+}