diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index 030a6cf..643f4fa 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -129,7 +129,7 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
 		pr_debug("\n");
 	}
 
-	ret = cmd_record(i, rec_argv, NULL);
+	ret = cmd_record(i, rec_argv);
 	free(rec_argv);
 	return ret;
 }
@@ -256,7 +256,7 @@ static int report_events(int argc, const char **argv, struct perf_mem *mem)
 	for (j = 1; j < argc; j++, i++)
 		rep_argv[i] = argv[j];
 
-	ret = cmd_report(i, rep_argv, NULL);
+	ret = cmd_report(i, rep_argv);
 	free(rep_argv);
 	return ret;
 }
@@ -330,7 +330,7 @@ parse_mem_ops(const struct option *opt, const char *str, int unset)
 	return ret;
 }
 
-int cmd_mem(int argc, const char **argv, const char *prefix __maybe_unused)
+int cmd_mem(int argc, const char **argv)
 {
 	struct stat st;
 	struct perf_mem mem = {