diff --git a/data/effects/chroma.xml b/data/effects/chroma.xml
index 88b1e22fe..1e1f5b3f7 100644
--- a/data/effects/chroma.xml
+++ b/data/effects/chroma.xml
@@ -1,12 +1,12 @@
 <!DOCTYPE kpartgui>
 <effect tag="chroma" id="chroma">
 	<name>Chroma Key</name>
 	<description>Make selected color transparent</description>
 	<author>Charles Yates</author>
 	<parameter type="color" name="key" default="0x0000ffff">
 		<name>Color key</name>
 	</parameter>
-	<parameter type="constant" name="variance" max="1000" min="0" factor="1000" default="150">
+	<parameter type="constant" name="variance" max="1000" min="0" factor="1000" default=".150">
 		<name>Variance</name>
 	</parameter>
 </effect>