diff --git a/pkg/fatfs/fatfs_vfs/fatfs_vfs.c b/pkg/fatfs/fatfs_vfs/fatfs_vfs.c
index 08be5d7f51..45fa4263ac 100644
--- a/pkg/fatfs/fatfs_vfs/fatfs_vfs.c
+++ b/pkg/fatfs/fatfs_vfs/fatfs_vfs.c
@@ -29,6 +29,7 @@
 #include "fs/fatfs.h"
 
 #include "time.h"
+#include "mutex.h"
 
 #define ENABLE_DEBUG 0
 #include <debug.h>