diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 355902795f0a..554828219c33 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3375,6 +3375,7 @@ process_defined_func(struct trace_seq *s, void *data, int size,
 			break;
 		}
 		farg = farg->next;
+		param = param->next;
 	}
 
 	ret = (*func_handle->func)(s, args);