diff --git a/common/board/esplan_ethernet.yaml b/common/board/esplan_ethernet.yaml
index 906ef89..6fd82ee 100644
--- a/common/board/esplan_ethernet.yaml
+++ b/common/board/esplan_ethernet.yaml
@@ -12,6 +12,6 @@ ethernet:
   mdio_pin: GPIO18
   clk:
     pin: GPIO17
-    mode: OUT
+    mode: CLK_EXT_IN
   phy_addr: 0
   power_pin: GPIO5
\ No newline at end of file