diff --git a/runtime/mem_map_test.cc b/runtime/mem_map_test.cc
index aa306ac..5f027b1 100644
--- a/runtime/mem_map_test.cc
+++ b/runtime/mem_map_test.cc
@@ -16,6 +16,8 @@
 
 #include "mem_map.h"
 
+#include <sys/mman.h>
+
 #include <memory>
 
 #include "common_runtime_test.h"