diff --git a/acsApp/src/devMCB4B.c b/acsApp/src/devMCB4B.c
index ca414ed..e600e91 100644
--- a/acsApp/src/devMCB4B.c
+++ b/acsApp/src/devMCB4B.c
@@ -93,6 +93,7 @@ static int MCB4B_table[] = {
     IMMEDIATE,  /* SET_VELOCITY */
     IMMEDIATE,  /* SET_ACCEL */
     IMMEDIATE,  /* GO */
+    IMMEDIATE,  /* SET_ENC_RATIO */
     INFO,       /* GET_INFO */
     MOVE_TERM,  /* STOP_AXIS */
     VELOCITY,   /* JOG */
@@ -277,6 +278,13 @@ STATIC long MCB4B_build_trans(motor_cmnd command, double *parms, struct motorRec
          */
         trans->state = IDLE_STATE;
         break;
+    case SET_ENC_RATIO:
+        /*
+         * The MCB4B does not have the concept of encoder ratio, ignore this
+         * command
+         */
+        trans->state = IDLE_STATE;
+        break;
     case GET_INFO:
         /* These commands are not actually done by sending a message, but
            rather they will indirectly cause the driver to read the status