diff --git a/examples/userfs/userfs_main.c b/examples/userfs/userfs_main.c
index 0a6b89cee6b..d1d64fa80e6 100644
--- a/examples/userfs/userfs_main.c
+++ b/examples/userfs/userfs_main.c
@@ -245,7 +245,7 @@ static int ufstest_open(FAR void *volinfo, FAR const char *relpath,
           file->inuse = 0;
         }
 
-      if ((oflags & (O_WROK | O_APPEND)) == (O_WROK | O_APPEND))
+      if ((oflags & (O_WRONLY | O_APPEND)) == (O_WRONLY | O_APPEND))
         {
           opriv->pos = file->inuse;
         }
diff --git a/system/usbmsc/usbmsc_main.c b/system/usbmsc/usbmsc_main.c
index 3cddcc2306e..e625e003bbb 100644
--- a/system/usbmsc/usbmsc_main.c
+++ b/system/usbmsc/usbmsc_main.c
@@ -581,7 +581,7 @@ int main(int argc, FAR char *argv[])
              num_luns, luns[num_luns].path);
 
       ret = usbmsc_bindlun(handle, luns[num_luns].path, 0, 0, 0,
-                           luns[num_luns].flags & O_WROK ? false : true);
+                           luns[num_luns].flags & O_WRONLY ? false : true);
       if (ret < 0)
         {
           printf("mcsonn_main: usbmsc_bindlun failed for LUN %d using %s: "