diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index dcb0b758cc..12d6d06fa2 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -25,6 +25,7 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/mman.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>