diff --git a/src/worker.js b/src/worker.js
index 3a79f5ab89a1f..056e934b9730c 100644
--- a/src/worker.js
+++ b/src/worker.js
@@ -183,7 +183,7 @@ this.onmessage = function(e) {
       var max = e.data.stackBase + e.data.stackSize;
       var top = e.data.stackBase;
 #endif
-      {{{ makeAsmExportAndGlobalAssignTargetInPthread('STACK_BASE') }}} = e.data.stackBase;
+      {{{ makeAsmExportAndGlobalAssignTargetInPthread('STACK_BASE') }}} = top;
       {{{ makeAsmExportAndGlobalAssignTargetInPthread('STACKTOP') }}} = top;
       {{{ makeAsmExportAndGlobalAssignTargetInPthread('STACK_MAX') }}} = max;
 #if ASSERTIONS
@@ -194,7 +194,6 @@ this.onmessage = function(e) {
 #if WASM_BACKEND
       assert(max === e.data.stackBase);
       assert(top > max);
-      assert(e.data.stackBase == max);
 #else
       assert(max > e.data.stackBase);
       assert(max > top);