diff --git a/src/postamble.js b/src/postamble.js
index 3785f3f29da66..06728478ec55e 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -132,12 +132,6 @@ function stackCheckInit() {
 }
 #endif
 
-#if MAIN_MODULE && PTHREADS
-// Map of modules to be shared with new threads.  This gets populated by the
-// main thread and shared with all new workers via the initial `load` message.
-var sharedModules = {};
-#endif
-
 #if MAIN_READS_PARAMS
 function run(args = arguments_) {
 #else
diff --git a/src/runtime_pthread.js b/src/runtime_pthread.js
index 15eb085d71f40..86aed2a1be28e 100644
--- a/src/runtime_pthread.js
+++ b/src/runtime_pthread.js
@@ -14,6 +14,12 @@
 var workerID = 0;
 #endif
 
+#if MAIN_MODULE
+// Map of modules to be shared with new threads.  This gets populated by the
+// main thread and shared with all new workers via the initial `load` message.
+var sharedModules = {};
+#endif
+
 if (ENVIRONMENT_IS_PTHREAD) {
 #if !MINIMAL_RUNTIME
   var wasmModuleReceived;
diff --git a/test/test_other.py b/test/test_other.py
index 7bdd4ef0c4d99..604feafb9457e 100644
--- a/test/test_other.py
+++ b/test/test_other.py
@@ -2176,6 +2176,7 @@ def test(link_flags, lib_suffix):
     test(['libdir/libfile.so.3.1.4.1.5.9'], '.3.1.4.1.5.9') # handle libX.so.1.2.3 as well
 
   @node_pthreads
+  @also_with_modularize
   def test_dylink_pthread_static_data(self):
     # Test that a side module uses the same static data region for global objects across all threads
 
@@ -15272,7 +15273,7 @@ def test_preload_module(self, args):
 
         // Check that it was preloaded.
         // The preloading actually only happens on the main thread where the filesystem
-        // lives.  On worker threads the module object is shared via preloadedModules.
+        // lives.  On worker threads the module object is shared via sharedModules.
         if (emscripten_is_main_runtime_thread()) {
           int found = EM_ASM_INT(
             return preloadedWasm['/library.so'] !== undefined;