diff --git a/h_malloc.c b/h_malloc.c
index d25c37a..47fa739 100644
--- a/h_malloc.c
+++ b/h_malloc.c
@@ -10,7 +10,6 @@
 
 #include <malloc.h>
 #include <pthread.h>
-#include <sys/mman.h>
 #include <unistd.h>
 
 #include "third_party/libdivide.h"