diff --git a/src/save-cache.ts b/src/save-cache.ts
index 4ee5679..e79d657 100644
--- a/src/save-cache.ts
+++ b/src/save-cache.ts
@@ -53,11 +53,11 @@ async function saveCache(): Promise<void> {
   }
 
   let actualCachePath = cacheLocalPath;
-  if (process.env.UV_CACHE_DIR !== cacheLocalPath) {
+  if (process.env.UV_CACHE_DIR && process.env.UV_CACHE_DIR !== cacheLocalPath) {
     core.warning(
       `The environment variable UV_CACHE_DIR has been changed to "${process.env.UV_CACHE_DIR}", by an action or step running after astral-sh/setup-uv. This can lead to unexpected behavior. If you expected this to happen set the cache-local-path input to "${process.env.UV_CACHE_DIR}" instead of "${cacheLocalPath}".`,
     );
-    actualCachePath = process.env.UV_CACHE_DIR!;
+    actualCachePath = process.env.UV_CACHE_DIR;
   }
 
   core.info(`Saving cache path: ${actualCachePath}`);