diff --git a/nx/source/runtime/devices/fs_dev.c b/nx/source/runtime/devices/fs_dev.c
index d10f249a..089e6a74 100644
--- a/nx/source/runtime/devices/fs_dev.c
+++ b/nx/source/runtime/devices/fs_dev.c
@@ -242,7 +242,7 @@ fsdev_getfspath(struct _reent *r,
     return -1;
 
   memset(outpath, 0, FS_MAX_PATH);
-  memcpy(outpath, __fixedpath,FS_MAX_PATH);
+  memcpy(outpath, __fixedpath,FS_MAX_PATH-1);
   outpath[FS_MAX_PATH-1] = '\0';
 
   return 0;