diff --git a/libraries/AP_HAL_Linux/RCOutput_PRU.cpp b/libraries/AP_HAL_Linux/RCOutput_PRU.cpp
index 03241a33a5..f07bebd6e0 100644
--- a/libraries/AP_HAL_Linux/RCOutput_PRU.cpp
+++ b/libraries/AP_HAL_Linux/RCOutput_PRU.cpp
@@ -22,7 +22,6 @@ using namespace Linux;
 #define PWM_CHAN_COUNT 12
 
 static const uint8_t chan_pru_map[]= {10,8,11,9,7,6,5,4,3,2,1,0};                //chan_pru_map[CHANNEL_NUM] = PRU_REG_R30/31_NUM;
-static const uint8_t pru_chan_map[]= {11,10,9,8,7,6,5,4,1,3,0,2};                //pru_chan_map[PRU_REG_R30/31_NUM] = CHANNEL_NUM;
 
 static void catch_sigbus(int sig)
 {