diff --git a/y2022/wpilib_interface.cc b/y2022/wpilib_interface.cc
index 2294cda..a1b1202 100644
--- a/y2022/wpilib_interface.cc
+++ b/y2022/wpilib_interface.cc
@@ -518,7 +518,7 @@
     WriteCan(output.roller_voltage_back(), roller_falcon_back_.get());
     WritePwm(output.transfer_roller_voltage_front(),
              transfer_roller_victor_front_.get());
-    WritePwm(output.transfer_roller_voltage_back(),
+    WritePwm(-output.transfer_roller_voltage_back(),
              transfer_roller_victor_back_.get());
 
     WriteCan(-output.flipper_arms_voltage(), flipper_arms_falcon_.get());