diff --git a/linker/dlfcn.cpp b/linker/dlfcn.cpp
index 228e30a..255363f 100644
--- a/linker/dlfcn.cpp
+++ b/linker/dlfcn.cpp
@@ -279,6 +279,7 @@
 }
 
 android_namespace_t* __loader_android_get_exported_namespace(const char* name) {
+  ScopedPthreadMutexLocker locker(&g_dl_mutex);
   return get_exported_namespace(name);
 }