diff --git a/src/apsctl/RCU.yaml b/src/apsctl/RCU.yaml
index fda46ea0f05e8cb097856a33967f32e7a3c1f97e..86877bbf0fb2aea6ff6114594bc1c1d1349d6b66 100644
--- a/src/apsctl/RCU.yaml
+++ b/src/apsctl/RCU.yaml
@@ -221,6 +221,24 @@ variables:
      dim: 96
      mask: Ant_mask
 
+   - name: RCU_GPIO1
+     driver: I2C_RFCHAIN
+     devreg:  [IO1.GPIO1,IO2.GPIO1,IO3.GPIO1]
+     width: 8
+     rw:  ro
+     dtype: uint8
+     dim: 96
+     mask: Ant_mask
+
+   - name: RCU_GPIO2
+     driver: I2C_RFCHAIN
+     devreg:  [IO1.GPIO2,IO2.GPIO2,IO3.GPIO2]
+     width: 8
+     rw:  ro
+     dtype: uint8
+     dim: 96
+     mask: Ant_mask
+
    - name: RCU_LED0
      driver: I2C_RCU
      description: LED on RCU