diff --git a/linker/linker.cpp b/linker/linker.cpp
index de7b04d..ba50d5c 100755
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -811,11 +811,15 @@
   }
 }
 
-soinfo* do_dlopen(const char* name, int flags) {
+soinfo* do_dlopen(const char* name, int flags, const android_dlextinfo* extinfo) {
   if ((flags & ~(RTLD_NOW|RTLD_LAZY|RTLD_LOCAL|RTLD_GLOBAL)) != 0) {
     DL_ERR("invalid flags to dlopen: %x", flags);
     return NULL;
   }
+  if (extinfo != NULL && ((extinfo->flags & ~(ANDROID_DLEXT_VALID_FLAG_BITS)) != 0)) {
+    DL_ERR("invalid extended flags to android_dlopen_ext: %x", extinfo->flags);
+    return NULL;
+  }
   set_soinfo_pool_protection(PROT_READ | PROT_WRITE);
   soinfo* si = find_library(name);
   if (si != NULL) {