diff --git a/src/os/vxworks/src/os-impl-dirs.c b/src/os/vxworks/src/os-impl-dirs.c
index 39dad61d8..8f2c5e01e 100644
--- a/src/os/vxworks/src/os-impl-dirs.c
+++ b/src/os/vxworks/src/os-impl-dirs.c
@@ -132,8 +132,8 @@ int32 OS_DirRead_Impl(uint32 local_id, os_dirent_t *dirent)
       return OS_FS_ERROR;
    }
 
-   strncpy(dirent->FileName, de->d_name, OS_MAX_PATH_LEN - 1);
-   dirent->FileName[OS_MAX_PATH_LEN - 1] = 0;
+   strncpy(dirent->FileName, de->d_name, sizeof(dirent->FileName)-1);
+   dirent->FileName[sizeof(dirent->FileName)-1] = 0;
 
    return OS_FS_SUCCESS;
 } /* end OS_DirRead_Impl */