diff --git a/packages/vite/src/node/ssr/ssrManifestPlugin.ts b/packages/vite/src/node/ssr/ssrManifestPlugin.ts
index 993fae1632ed5d..de4c55e66058bd 100644
--- a/packages/vite/src/node/ssr/ssrManifestPlugin.ts
+++ b/packages/vite/src/node/ssr/ssrManifestPlugin.ts
@@ -68,7 +68,9 @@ export function ssrManifestPlugin(config: ResolvedConfig): Plugin {
                   join(dirname(chunk.fileName), url.slice(1, -1))
                 )
                 addDeps(normalizedFile)
-                ssrManifest[basename(name!)] = deps
+                if (name) {
+                  ssrManifest[basename(name!)] = deps
+                }
               }
             }
           }