diff --git a/libbcachefs.c b/libbcachefs.c
index 82f131cf..a3b9c30c 100644
--- a/libbcachefs.c
+++ b/libbcachefs.c
@@ -2,6 +2,7 @@
 #include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
+#include <libgen.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>