diff --git a/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp b/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
index 5334ce873eca40e7281c451a25d7a2b00c210736..d440a6124b670088781fcc43258ff0b5c6e76ad1 100644
--- a/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
+++ b/tools/clang-format/fuzzer/ClangFormatFuzzer.cpp
@@ -20,7 +20,10 @@ extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
   std::string s((const char *)data, size);
   auto Style = getGoogleStyle(clang::format::FormatStyle::LK_Cpp);
   Style.ColumnLimit = 60;
-  applyAllReplacements(s, clang::format::reformat(
-                              Style, s, {clang::tooling::Range(0, s.size())}));
+  auto Replaces = reformat(Style, s, clang::tooling::Range(0, s.size()));
+  auto Result = applyAllReplacements(s, Replaces);
+
+  // Output must be checked, as otherwise we crash.
+  if (!Result) {}
   return 0;
 }