diff --git a/src/debugger.c b/src/debugger.c
index 66647ab..5508ea3 100644
--- a/src/debugger.c
+++ b/src/debugger.c
@@ -1000,7 +1000,7 @@
 }
 
     static void
-prof_clear_cache()
+prof_clear_cache(void)
 {
     if (!prof_cache_initialized)
     {