1 files changed, 2 insertions, 4 deletions
diff --git a/boost/geometry/algorithms/detail/overlay/select_rings.hpp b/boost/geometry/algorithms/detail/overlay/select_rings.hpp
index 1b3cd866d7..de5eac8acb 100644
--- a/boost/geometry/algorithms/detail/overlay/select_rings.hpp
+++ b/boost/geometry/algorithms/detail/overlay/select_rings.hpp
@@ -165,11 +165,8 @@ namespace dispatch
 
 template<overlay_type OverlayType>
 struct decide
-{};
-
-template<>
-struct decide<overlay_union>
 {
+    // Default implementation (union, inflate, deflate, dissolve)
     static bool include(ring_identifier const& , ring_turn_info const& info)
     {
         return ! info.within_other;
@@ -179,6 +176,7 @@ struct decide<overlay_union>
     {
         return false;
     }
+
 };
 
 template<>