diff --git a/platform/javascript/detect.py b/platform/javascript/detect.py
index 149033d4375..a6563ff26c1 100644
--- a/platform/javascript/detect.py
+++ b/platform/javascript/detect.py
@@ -227,7 +227,7 @@ def configure(env):
     env.Append(LINKFLAGS=["-s", "OFFSCREEN_FRAMEBUFFER=1"])
 
     # callMain for manual start.
-    env.Append(LINKFLAGS=["-s", "EXTRA_EXPORTED_RUNTIME_METHODS=['callMain']"])
+    env.Append(LINKFLAGS=["-s", "EXTRA_EXPORTED_RUNTIME_METHODS=['callMain','cwrap']"])
 
     # Add code that allow exiting runtime.
     env.Append(LINKFLAGS=["-s", "EXIT_RUNTIME=1"])