--- a/servo/components/style/properties/longhand/column.mako.rs
+++ b/servo/components/style/properties/longhand/column.mako.rs
@@ -49,19 +49,18 @@
 // https://drafts.csswg.org/css-multicol-1/#crc
 ${helpers.predefined_type("column-rule-color", "CSSColor",
                           "::cssparser::Color::CurrentColor",
                           initial_specified_value="specified::CSSColor::currentcolor()",
                           products="gecko", animation_value_type="IntermediateColor", extra_prefixes="moz",
                           complex_color=True, need_clone=True,
                           spec="https://drafts.csswg.org/css-multicol/#propdef-column-rule-color")}
 
-// It's not implemented in servo or gecko yet.
 ${helpers.single_keyword("column-span", "none all",
-                         products="none", animation_value_type="none",
+                         products="gecko", animation_value_type="none",
                          spec="https://drafts.csswg.org/css-multicol/#propdef-column-span")}
 
 ${helpers.single_keyword("column-rule-style",
                          "none hidden dotted dashed solid double groove ridge inset outset",
                          products="gecko", extra_prefixes="moz",
                          gecko_constant_prefix="NS_STYLE_BORDER_STYLE",
                          animation_value_type="none",
                          spec="https://drafts.csswg.org/css-multicol/#propdef-column-rule-style")}