diff --git a/firmware/ec/inc/subsystem/sdr/sdr.h b/firmware/ec/inc/subsystem/sdr/sdr.h
index 2eea71678b..7f2df654db 100644
--- a/firmware/ec/inc/subsystem/sdr/sdr.h
+++ b/firmware/ec/inc/subsystem/sdr/sdr.h
@@ -61,7 +61,7 @@ typedef struct Sdr_gpioCfg {
 /*****************************************************************************
  *                           FUNCTION DECLARATIONS
  *****************************************************************************/
-void sdr_pwr_control(Sdr_gpioCfg *driver,
+void sdr_pwr_control(const Sdr_gpioCfg *driver,
                      uint8_t control); /* TODO: hack to let OBC work */
 
 /* Schema hooks */
diff --git a/firmware/ec/src/subsystem/sdr/sdr.c b/firmware/ec/src/subsystem/sdr/sdr.c
index 6d288cdb9c..41194c5cf1 100644
--- a/firmware/ec/src/subsystem/sdr/sdr.c
+++ b/firmware/ec/src/subsystem/sdr/sdr.c
@@ -36,7 +36,7 @@
  **    RETURN TYPE     : ReturnStatus
  **
  *****************************************************************************/
-void sdr_pwr_control(Sdr_gpioCfg *sdr_gpioCfg, uint8_t control)
+void sdr_pwr_control(const Sdr_gpioCfg *sdr_gpioCfg, uint8_t control)
 {
     /* Using configure instead of 'write' here since this pin is shared with
      * OBC and we don't want to configure then write if OBC has already