diff --git a/tools/perf/util/mmap.h b/tools/perf/util/mmap.h
index cd8b0777473b..cd4ccec7f361 100644
--- a/tools/perf/util/mmap.h
+++ b/tools/perf/util/mmap.h
@@ -9,7 +9,6 @@
 #include <linux/bitops.h>
 #include <perf/cpumap.h>
 #include <stdbool.h>
-#include <pthread.h> // for cpu_set_t
 #ifdef HAVE_AIO_SUPPORT
 #include <aio.h>
 #endif