diff --git a/clang/lib/Index/IndexingAction.cpp b/clang/lib/Index/IndexingAction.cpp
index 25212ac6afb00..078f3a5c9dbbc 100644
--- a/clang/lib/Index/IndexingAction.cpp
+++ b/clang/lib/Index/IndexingAction.cpp
@@ -604,6 +604,7 @@ class IndexRecordASTConsumer : public ASTConsumer {
   }
 
   bool HandleTopLevelDecl(DeclGroupRef DG) override {
+    llvm::PrettyStackTraceFormat trace("indexing");
     return IndexCtx->indexDeclGroupRef(DG);
   }
 
@@ -612,6 +613,7 @@ class IndexRecordASTConsumer : public ASTConsumer {
   }
 
   void HandleTopLevelDeclInObjCContainer(DeclGroupRef DG) override {
+    llvm::PrettyStackTraceFormat trace("indexing");
     IndexCtx->indexDeclGroupRef(DG);
   }