diff --git a/clang/lib/Analysis/UnsafeBufferUsage.cpp b/clang/lib/Analysis/UnsafeBufferUsage.cpp
index f586c0ad2caf98..df89ab43638085 100644
--- a/clang/lib/Analysis/UnsafeBufferUsage.cpp
+++ b/clang/lib/Analysis/UnsafeBufferUsage.cpp
@@ -895,10 +895,7 @@ class DeclUseTracker {
   }
 
   const DeclStmt *lookupDecl(const VarDecl *VD) const {
-    auto It = Defs.find(VD);
-    if (It == Defs.end())
-      return nullptr;
-    return It->second;
+    return Defs.lookup(VD);
   }
 };
 } // namespace