boost/boost/polygon/point_data.hpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/boost/boost/polygon/point_data.hpp b/boost/boost/polygon/point_data.hpp
index 8d5a59f..a2852c4 100644
--- a/boost/boost/polygon/point_data.hpp
+++ b/boost/boost/polygon/point_data.hpp
@@ -45,10 +45,17 @@ class point_data {
     return *this;
   }
 
+#ifdef __GNUC__
   template <typename PointType>
-  point_data(const PointType& that) {
+  explicit point_data(const PointType& that) {
     *this = that;
   }
+#else // __GNUC__
+  template <typename PointType>
+  point_data(const PointType& that) {
+	*this = that;
+  }
+#endif // __GNUC__
 
   template <typename PointType>
   point_data& operator=(const PointType& that) {