diff --git a/tools/perf/util/string.c b/tools/perf/util/string.c
index f6d90cdd9225..4f12a96f33cc 100644
--- a/tools/perf/util/string.c
+++ b/tools/perf/util/string.c
@@ -15,7 +15,6 @@ const char *dots =
 	"....................................................................."
 	".....................................................................";
 
-#define K 1024LL
 /*
  * perf_atoll()
  * Parse (\d+)(b|B|kb|KB|mb|MB|gb|GB|tb|TB) (e.g. "256MB")