diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 4b2ff021434c29a35450d03c4c610a59c319884e..64c06961bfe495341c954ffced4aa5e06d5e380e 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -503,7 +503,7 @@ void pthread__unblock_sigwinch(void)
 static void cache_line_size(int *cacheline_sizep)
 {
 	if (sysfs__read_int("devices/system/cpu/cpu0/cache/index0/coherency_line_size", cacheline_sizep))
-		perror("cannot determine cache line size");
+		pr_debug("cannot determine cache line size");
 }
 #endif