diff --git a/llvm/runtime/libprofile/BasicBlockTracing.c b/llvm/runtime/libprofile/BasicBlockTracing.c
index dbe81e3..0815e2e 100644
--- a/llvm/runtime/libprofile/BasicBlockTracing.c
+++ b/llvm/runtime/libprofile/BasicBlockTracing.c
@@ -30,7 +30,7 @@
 /* BBTraceAtExitHandler - When the program exits, just write out any remaining 
  * data and free the trace buffer.
  */
-static void BBTraceAtExitHandler() {
+static void BBTraceAtExitHandler(void) {
   WriteAndFlushBBTraceData ();
   free (ArrayStart);
 }