diff --git a/src/library_dylink.js b/src/library_dylink.js
index d7676cdc2036e..f616d230d9b3c 100644
--- a/src/library_dylink.js
+++ b/src/library_dylink.js
@@ -993,14 +993,23 @@ var LibraryDylink = {
 #endif
 
       // for wasm, we can use fetch for async, but for fs mode we can only imitate it
+      var libData;
       if (handle) {
         var data = {{{ makeGetValue('handle', C_STRUCTS.dso.file_data, '*') }}};
         var dataSize = {{{ makeGetValue('handle', C_STRUCTS.dso.file_data_size, '*') }}};
         if (data && dataSize) {
-          var libData = HEAP8.slice(data, data + dataSize);
-          return flags.loadAsync ? Promise.resolve(libData) : libData;
+          libData = HEAP8.slice(data, data + dataSize);
         }
       }
+      if (!libData && flags.fs && flags.fs.findObject(libName)) {
+        libData = flags.fs.readFile(libName, {encoding: 'binary'});
+        if (!(libData instanceof Uint8Array)) {
+          libData = new Uint8Array(libData);
+        }
+      }
+      if (libData) {
+        return flags.loadAsync ? Promise.resolve(libData) : libData;
+      }
 
       var libFile = locateFile(libName);
       if (flags.loadAsync) {