diff --git a/llvm/lib/CodeGenData/OutlinedHashTreeRecord.cpp b/llvm/lib/CodeGenData/OutlinedHashTreeRecord.cpp
index 996a57fd5e713..473d69e011e9a 100644
--- a/llvm/lib/CodeGenData/OutlinedHashTreeRecord.cpp
+++ b/llvm/lib/CodeGenData/OutlinedHashTreeRecord.cpp
@@ -119,7 +119,7 @@ void OutlinedHashTreeRecord::convertToStableData(
       [&NodeIdMap](const HashNode *Current) {
         size_t Index = NodeIdMap.size();
         NodeIdMap[Current] = Index;
-        assert(Index = NodeIdMap.size() + 1 &&
+        assert(Index + 1 == NodeIdMap.size() &&
                        "Expected size of NodeMap to increment by 1");
       },
       /*EdgeCallbackFn=*/nullptr, /*SortedWork=*/true);