diff --git a/prog/pwm/pwmconfig b/prog/pwm/pwmconfig
index 197e800c..5cb6cee9 100755
--- a/prog/pwm/pwmconfig
+++ b/prog/pwm/pwmconfig
@@ -451,7 +451,7 @@ do
 		OS=$(echo $SPEEDS | cut -d' ' -f$count)
 		S=$(echo $CURRENT_SPEEDS | cut -d' ' -f$count)
 		echo "  $j ... speed was $OS now $S"
-		let threshold=3*$OS/4
+		let threshold=5*$OS/6
 		if [ $S -lt $threshold ]
 		then
 			echo "    It appears that fan $j"