diff --git a/src/libslic3r/LayerRegion.cpp b/src/libslic3r/LayerRegion.cpp
index 913ba76a6..19fbb3bb6 100644
--- a/src/libslic3r/LayerRegion.cpp
+++ b/src/libslic3r/LayerRegion.cpp
@@ -258,13 +258,18 @@ void LayerRegion::process_external_surfaces(const Layer* lower_layer)
                 #ifdef SLIC3R_DEBUG
                 printf("Processing bridge at layer " PRINTF_ZU ":\n", this->layer()->id());
                 #endif
-                if (bd.detect_angle(Geometry::deg2rad(this->region()->config().bridge_angle.value))) {
+				double custom_angle = Geometry::deg2rad(this->region()->config().bridge_angle.value);
+				if (bd.detect_angle(custom_angle)) {
                     bridges[idx_last].bridge_angle = bd.angle;
                     if (this->layer()->object()->config().support_material) {
                         polygons_append(this->bridged, bd.coverage());
                         this->unsupported_bridge_edges.append(bd.unsupported_edges()); 
                     }
-                }
+				} else if (custom_angle > 0) {
+					// Bridge was not detected (likely it is only supported at one side). Still it is a surface filled in
+					// using a bridging flow, therefore it makes sense to respect the custom bridging direction.
+					bridges[idx_last].bridge_angle = custom_angle;
+				}
                 // without safety offset, artifacts are generated (GH #2494)
                 surfaces_append(bottom, union_ex(grown, true), bridges[idx_last]);
             }
diff --git a/src/libslic3r/Rasterizer/Rasterizer.hpp b/src/libslic3r/Rasterizer/Rasterizer.hpp
index a8c8e1866..671dcbb3d 100644
--- a/src/libslic3r/Rasterizer/Rasterizer.hpp
+++ b/src/libslic3r/Rasterizer/Rasterizer.hpp
@@ -6,7 +6,7 @@
 #include <vector>
 #include <cstdint>
 
-namespace ClipperLib { class Polygon; }
+namespace ClipperLib { struct Polygon; }
 
 namespace Slic3r {