diff --git a/tests/zfs-tests/cmd/mmap_seek/mmap_seek.c b/tests/zfs-tests/cmd/mmap_seek/mmap_seek.c
index f476e1dba9..bb36527aaf 100644
--- a/tests/zfs-tests/cmd/mmap_seek/mmap_seek.c
+++ b/tests/zfs-tests/cmd/mmap_seek/mmap_seek.c
@@ -29,7 +29,11 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
+#include <sys/sysmacros.h>
 #include <errno.h>
+#ifdef __linux__
+#include <linux/fs.h>
+#endif
 
 static void
 seek_data(int fd, off_t offset, off_t expected)