diff --git a/clang/tools/clang-rename/ClangRename.cpp b/clang/tools/clang-rename/ClangRename.cpp
index e7ceac7dbf303..7ba1978f07749 100644
--- a/clang/tools/clang-rename/ClangRename.cpp
+++ b/clang/tools/clang-rename/ClangRename.cpp
@@ -126,6 +126,9 @@ int main(int argc, const char **argv) {
         SymbolOffsets.push_back(Info.Offset);
       NewNames.push_back(Info.NewName);
     }
+  } else {
+    errs() << "clang-rename: input must be provided.\n";
+    return 1;
   }
 
   // Check the arguments for correctness.