diff --git a/cli/tsc/99_main_compiler.js b/cli/tsc/99_main_compiler.js
index ea70343be0..22e2a36417 100644
--- a/cli/tsc/99_main_compiler.js
+++ b/cli/tsc/99_main_compiler.js
@@ -304,6 +304,7 @@ delete Object.prototype.__proto__;
             /** @type {ts.IScriptSnapshot} */ (sourceFile.scriptSnapShot),
           ),
         );
+        documentRegistrySourceFileCache.set(mapKey, sourceFile);
       }
       return sourceFile;
     },