diff --git a/RTL8218B.md b/RTL8218B.md
index efa95a76..d1d1260c 100644
--- a/RTL8218B.md
+++ b/RTL8218B.md
@@ -23,7 +23,7 @@ Page | Register | Bits | Feature | Documentation
 0xa43 | 0x19 | 02:02 | RESERVED
 0xa43 | 0x19 | 01:01 | RXC_EN
 0xa43 | 0x19 | 00:00 | CLOCKOUT_EN
-**Page** | **Register** | **Bits** | **unknown** | 
+**Page** | **Register** | **Bits** | **PATCH** | **patch registers**
 0xa43 | 0x1B | 15:00 | PATCH_ADDRESS | patch step 3, 5, 7, .. write address to be patched
 0xa43 | 0x1C | 15:00 | PATCH_VALUE | patch step 4, 6, 8, ... write value to be patched at address
 **Page** | **Register** | **Bits** | **PHYCR3** | **PHY specific control register 3**