diff --git a/llvm/lib/Analysis/LazyCallGraph.cpp b/llvm/lib/Analysis/LazyCallGraph.cpp
index 1b9e6d36916d..3ab3c734263d 100644
--- a/llvm/lib/Analysis/LazyCallGraph.cpp
+++ b/llvm/lib/Analysis/LazyCallGraph.cpp
@@ -1811,7 +1811,9 @@ void LazyCallGraph::buildRefSCCs() {
         (void)Inserted;
         assert(Inserted && "Cannot already have this RefSCC in the index map!");
         PostOrderRefSCCs.push_back(NewRC);
+#ifndef NDEBUG
         NewRC->verify();
+#endif
       });
 }