diff --git a/tools/perf/util/strfilter.c b/tools/perf/util/strfilter.c
index 4064b7d708b..834c8ebfe38 100644
--- a/tools/perf/util/strfilter.c
+++ b/tools/perf/util/strfilter.c
@@ -1,4 +1,3 @@
-#include <ctype.h>
 #include "util.h"
 #include "string.h"
 #include "strfilter.h"