diff --git a/linux/shmem.c b/linux/shmem.c
index 69b2414197..6cb1eab0d3 100644
--- a/linux/shmem.c
+++ b/linux/shmem.c
@@ -16,7 +16,9 @@
 #include <sys/types.h>
 #include <sys/time.h>
 #include <sys/uio.h>
+#ifdef HAVE_SYS_MMAN_H
 #include <sys/mman.h>
+#endif
 #include <sys/socket.h>
 #include <fcntl.h>