4 files changed, 20 insertions, 0 deletions
diff --git a/src/mbgl/style/layers/layer.cpp.ejs b/src/mbgl/style/layers/layer.cpp.ejs
index fcae615fe0..201189c849 100644
--- a/src/mbgl/style/layers/layer.cpp.ejs
+++ b/src/mbgl/style/layers/layer.cpp.ejs
@@ -153,6 +153,9 @@ void <%- camelize(type) %>Layer::set<%- camelize(property.name) %>(<%- propertyV
         return;
     auto impl_ = mutableImpl();
     impl_->paint.template get<<%- camelize(property.name) %>>().value = value;
+<% if (property.name === 'line-width') { -%>
+    impl_->paint.template get<LineFloorWidth>().value = value;
+<% } -%>
     baseImpl = std::move(impl_);
     observer->onLayerChanged(*this);
 }
diff --git a/src/mbgl/style/layers/layer_properties.hpp.ejs b/src/mbgl/style/layers/layer_properties.hpp.ejs
index 89dffdcd42..de647fbc07 100644
--- a/src/mbgl/style/layers/layer_properties.hpp.ejs
+++ b/src/mbgl/style/layers/layer_properties.hpp.ejs
@@ -37,6 +37,13 @@ struct <%- camelize(property.name) %> : <%- paintPropertyType(property, type) %>
     template<typename T> static bool hasOverride(const T& t) { return !!t.<%- camelizeWithLeadingLowercase(property.name) %>; };
 <% } -%>
 };
+<% if (property.name === 'line-width') { -%>
+
+struct LineFloorWidth : DataDrivenPaintProperty<float, attributes::floorwidth, uniforms::floorwidth> {
+    using EvaluatorType = DataDrivenPropertyEvaluator<float, true>;
+    static float defaultValue() { return 1.0f; }
+};
+<% } -%>
 <%   } -%>
 
 <% } -%>
@@ -52,6 +59,9 @@ class <%- camelize(type) %>LayoutProperties : public Properties<
 class <%- camelize(type) %>PaintProperties : public Properties<
 <% for (const property of paintProperties.slice(0, -1)) { -%>
     <%- camelize(property.name) %>,
+<% if (property.name === 'line-width') { -%>
+    LineFloorWidth,
+<% } -%>
 <% } -%>
     <%- camelize(paintProperties.slice(-1)[0].name) %>
 > {};
diff --git a/src/mbgl/style/layers/line_layer.cpp b/src/mbgl/style/layers/line_layer.cpp
index 643c294edf..0a20762697 100644
--- a/src/mbgl/style/layers/line_layer.cpp
+++ b/src/mbgl/style/layers/line_layer.cpp
@@ -248,6 +248,7 @@ void LineLayer::setLineWidth(PropertyValue<float> value) {
         return;
     auto impl_ = mutableImpl();
     impl_->paint.template get<LineWidth>().value = value;
+    impl_->paint.template get<LineFloorWidth>().value = value;
     baseImpl = std::move(impl_);
     observer->onLayerChanged(*this);
 }
diff --git a/src/mbgl/style/layers/line_layer_properties.hpp b/src/mbgl/style/layers/line_layer_properties.hpp
index 208c2d142f..33d7eddbe8 100644
--- a/src/mbgl/style/layers/line_layer_properties.hpp
+++ b/src/mbgl/style/layers/line_layer_properties.hpp
@@ -52,6 +52,11 @@ struct LineWidth : DataDrivenPaintProperty<float, attributes::width, uniforms::w
     static float defaultValue() { return 1; }
 };
 
+struct LineFloorWidth : DataDrivenPaintProperty<float, attributes::floorwidth, uniforms::floorwidth> {
+    using EvaluatorType = DataDrivenPropertyEvaluator<float, true>;
+    static float defaultValue() { return 1.0f; }
+};
+
 struct LineGapWidth : DataDrivenPaintProperty<float, attributes::gapwidth, uniforms::gapwidth> {
     static float defaultValue() { return 0; }
 };
@@ -88,6 +93,7 @@ class LinePaintProperties : public Properties<
     LineTranslate,
     LineTranslateAnchor,
     LineWidth,
+    LineFloorWidth,
     LineGapWidth,
     LineOffset,
     LineBlur,