diff --git a/fhem/CHANGED b/fhem/CHANGED
index f682e6e6e..d1febf54c 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - bugfix:  31_MilightDevice: Fixed incompatibility with Color::rgb2hsv
   - feature: new module 37_fakeRoku.pm to control fhem from a harmony hub
   - feature: new module 52_I2C_MMA845X.pm added
   - change:  49_SSCAM: change to new RemoveInternalTimer for functions
diff --git a/fhem/FHEM/31_MilightDevice.pm b/fhem/FHEM/31_MilightDevice.pm
index 8266a7749..111db295c 100644
--- a/fhem/FHEM/31_MilightDevice.pm
+++ b/fhem/FHEM/31_MilightDevice.pm
@@ -440,7 +440,7 @@ sub MilightDevice_Set(@)
     $usage = "Usage: set $name rgb RRGGBB [seconds(0..x)] [flags(l=long path|q=don't clear queue)]";
     return $usage if ($args[0] !~ /^([0-9A-Fa-f]{1,2})([0-9A-Fa-f]{1,2})([0-9A-Fa-f]{1,2})$/);
     my( $r, $g, $b ) = (hex($1), hex($2), hex($3)); #change to color.pm?
-    my( $h, $s, $v ) = Color::rgb2hsv($r,$g,$b);
+    my( $h, $s, $v ) = Color::rgb2hsv($r/255.0,$g/255.0,$b/255.0);
     $h = MilightDevice_roundfunc($h * 360);
     $s = MilightDevice_roundfunc($s * 100);
     $v = MilightDevice_roundfunc($v * 100);