diff --git a/net/mac80211/rc80211_pid.h b/net/mac80211/rc80211_pid.h
index 425eb708182ad050dd672f3c7ef9568441f0a6a2..81aa4ea19958e6ddb13da395d63fa6ce0b55a067 100644
--- a/net/mac80211/rc80211_pid.h
+++ b/net/mac80211/rc80211_pid.h
@@ -38,7 +38,7 @@
  * link quality is good, the controller will fail to adjust failed frames
  * percentage to the target. This is intentional.
  */
-#define RC_PID_TARGET_PF (11 << RC_PID_ARITH_SHIFT)
+#define RC_PID_TARGET_PF 11
 
 /* Rate behaviour normalization quantity over time. */
 #define RC_PID_NORM_OFFSET 3
diff --git a/net/mac80211/rc80211_pid_algo.c b/net/mac80211/rc80211_pid_algo.c
index 631e46888267457604cc40f7bab08ca9917d59c2..b84e51480c844f90f818519155bf3bdc9fa1a75c 100644
--- a/net/mac80211/rc80211_pid_algo.c
+++ b/net/mac80211/rc80211_pid_algo.c
@@ -210,7 +210,7 @@ static void rate_control_pid_sample(struct rc_pid_info *pinfo,
 	rate_control_pid_normalize(pinfo, mode->num_rates);
 
 	/* Compute the proportional, integral and derivative errors. */
-	err_prop = pinfo->target - pf;
+	err_prop = (pinfo->target << RC_PID_ARITH_SHIFT) - pf;
 
 	err_avg = spinfo->err_avg_sc >> pinfo->smoothing_shift;
 	spinfo->err_avg_sc = spinfo->err_avg_sc - err_avg + err_prop;