diff --git a/src/class_linker.cc b/src/class_linker.cc
index f343ed4..6f1e5aa 100644
--- a/src/class_linker.cc
+++ b/src/class_linker.cc
@@ -1881,6 +1881,8 @@
 #endif
 
 void ClassLinker::VerifyClass(Class* klass) {
+  ObjectLock lock(klass);
+
   // TODO: assert that the monitor on the Class is held
   if (klass->IsVerified()) {
     return;