diff --git a/src/cache-save.ts b/src/cache-save.ts
index 4dfe4165..e0dc6162 100644
--- a/src/cache-save.ts
+++ b/src/cache-save.ts
@@ -70,7 +70,7 @@ async function saveCache(packageManager: string) {
     return;
   }
 
-  if (cacheId == -1) {
+  if (cacheId === -1) {
     // saveCache returns -1 without throwing when the cache was not saved, e.g.
     // a reserve collision or a read-only token (fork PR). @actions/cache has
     // already logged the reason at the appropriate severity, so just trace it.