diff --git a/dom/workers/RuntimeService.cpp b/dom/workers/RuntimeService.cpp
index 85201cd5c..ae41b1955 100644
--- a/dom/workers/RuntimeService.cpp
+++ b/dom/workers/RuntimeService.cpp
@@ -95,7 +95,8 @@ using mozilla::dom::indexedDB::IndexedDatabaseManager;
 
 // Half the size of the actual C stack, to be safe.
 // We need a little larger than regular Firefox.
-#define WORKER_CONTEXT_NATIVE_STACK_LIMIT 512 * sizeof(size_t) * 1024
+// This should be less than kWorkerStackSize in WorkerThread.cpp.
+#define WORKER_CONTEXT_NATIVE_STACK_LIMIT 15360 * sizeof(size_t) * 1024
 
 // The maximum number of threads to use for workers, overridable via pref.
 #define MAX_WORKERS_PER_DOMAIN 10