diff --git a/src/library_pthread.js b/src/library_pthread.js
index a7621c1f67bf3..0fe387cc36fd7 100644
--- a/src/library_pthread.js
+++ b/src/library_pthread.js
@@ -5,7 +5,7 @@
  */
 
 var LibraryPThread = {
-  $PThread__postset: 'if (!ENVIRONMENT_IS_PTHREAD) PThread.initMainThreadBlock(); else PThread.initWorker();',
+  $PThread__postset: 'if (!ENVIRONMENT_IS_PTHREAD) PThread.initMainThreadBlock();',
   $PThread__deps: ['$registerPthreadPtr',
                    '$ERRNO_CODES', 'emscripten_futex_wake', '$killThread',
                    '$cancelThread', '$cleanupThread',
@@ -87,6 +87,18 @@ var LibraryPThread = {
       _emscripten_register_main_browser_thread_id(PThread.mainThreadBlock);
     },
     initWorker: function() {
+#if EMBIND
+      // Embind must initialize itself on all threads, as it generates support JS.
+      Module['___embind_register_native_and_builtin_types']();
+#endif // EMBIND
+#if MODULARIZE
+      // The promise resolve function typically gets called as part of the execution
+      // of the Module `run`. The workers/pthreads don't execute `run` here, they
+      // call `run` in response to a message at a later time, so the creation
+      // promise can be resolved, marking the pthread-Module as initialized.
+      readyPromiseResolve(Module);
+#endif // MODULARIZE
+
 #if USE_CLOSURE_COMPILER
       // worker.js is not compiled together with us, and must access certain
       // things.
diff --git a/src/postamble.js b/src/postamble.js
index 72c6ec5764bf9..157581ece8378 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -470,17 +470,7 @@ if (!ENVIRONMENT_IS_PTHREAD) // EXIT_RUNTIME=0 only applies to default behavior
 if (!ENVIRONMENT_IS_PTHREAD) {
   run();
 } else {
-#if EMBIND
-  // Embind must initialize itself on all threads, as it generates support JS.
-  Module['___embind_register_native_and_builtin_types']();
-#endif // EMBIND
-#if MODULARIZE
-  // The promise resolve function typically gets called as part of the execution 
-  // of the Module `run`. The workers/pthreads don't execute `run` here, they
-  // call `run` in response to a message at a later time, so the creation
-  // promise can be resolved, marking the pthread-Module as initialized.
-  readyPromiseResolve(Module);
-#endif // MODULARIZE
+  PThread.initWorker();
 }
 #else
 run();
diff --git a/src/postamble_minimal.js b/src/postamble_minimal.js
index 77e5ffbc4b85d..4da7dd814f83f 100644
--- a/src/postamble_minimal.js
+++ b/src/postamble_minimal.js
@@ -64,7 +64,11 @@ function initRuntime(asm) {
   Module['registerPthreadPtr'] = registerPthreadPtr;
   Module['_pthread_self'] = _pthread_self;
 
-  if (ENVIRONMENT_IS_PTHREAD) return;
+  if (ENVIRONMENT_IS_PTHREAD) {
+    PThread.initWorker();
+    return;
+  }
+
   // Pass the thread address inside the asm.js scope to store it for fast access that avoids the need for a FFI out.
   registerPthreadPtr(PThread.mainThreadBlock, /*isMainBrowserThread=*/!ENVIRONMENT_IS_WORKER, /*isMainRuntimeThread=*/1);
   _emscripten_register_main_browser_thread_id(PThread.mainThreadBlock);