diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index 9f866a2..17e7960 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -204,7 +204,7 @@
 
     /* Dtrace USDT point */
     if (dtrace) {
-        PyDTrace_AUDIT(event, (void *)eventArgs);
+        PyDTrace_AUDIT((char *)event, (void *)eventArgs);
     }
 
     /* Call interpreter hooks */