diff --git a/board/czechlight/clearfog/linux.fragment b/board/czechlight/clearfog/linux.fragment
index b2db091..724d3c5 100644
--- a/board/czechlight/clearfog/linux.fragment
+++ b/board/czechlight/clearfog/linux.fragment
@@ -14,3 +14,6 @@
 
 # SPI-to-Quad-UART
 CONFIG_SERIAL_MAX310X=y
+
+# Extra I2C bus for the PSUs
+CONFIG_I2C_GPIO=y