1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Fuzzer/test/CounterTest.cpp b/lib/Fuzzer/test/CounterTest.cpp
index 29ddb02ebaea..b61f419c4991 100644
--- a/lib/Fuzzer/test/CounterTest.cpp
+++ b/lib/Fuzzer/test/CounterTest.cpp
@@ -2,7 +2,7 @@
 // executed many times.
 #include <iostream>
 
-extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
   int Num = 0;
   for (size_t i = 0; i < Size; i++)
     if (Data[i] == 'A' + i)
@@ -11,4 +11,5 @@ extern "C" void LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
     std::cerr <<  "BINGO!\n";
     exit(1);
   }
+  return 0;
 }