diff --git a/include/SFML/Graphics/CircleShape.hpp b/include/SFML/Graphics/CircleShape.hpp
index 681e66107..cb0ffed0e 100644
--- a/include/SFML/Graphics/CircleShape.hpp
+++ b/include/SFML/Graphics/CircleShape.hpp
@@ -47,7 +47,7 @@ public :
     /// \param radius Radius of the circle
     ///
     ////////////////////////////////////////////////////////////
-    CircleShape(float radius = 0);
+    explicit CircleShape(float radius = 0);
 
     ////////////////////////////////////////////////////////////
     /// \brief Set the radius of the circle
diff --git a/include/SFML/Graphics/ConvexShape.hpp b/include/SFML/Graphics/ConvexShape.hpp
index d84bdfaff..ed3ccd39f 100644
--- a/include/SFML/Graphics/ConvexShape.hpp
+++ b/include/SFML/Graphics/ConvexShape.hpp
@@ -45,8 +45,10 @@ public :
     ////////////////////////////////////////////////////////////
     /// \brief Default constructor
     ///
+    /// \param pointsCount Number of points of the polygon
+    ///
     ////////////////////////////////////////////////////////////
-    ConvexShape();
+    explicit ConvexShape(unsigned int pointsCount = 0);
 
     ////////////////////////////////////////////////////////////
     /// \brief Set the number of points of the polygon
diff --git a/include/SFML/Graphics/RectangleShape.hpp b/include/SFML/Graphics/RectangleShape.hpp
index 907c3a7d1..48e9f5d4d 100644
--- a/include/SFML/Graphics/RectangleShape.hpp
+++ b/include/SFML/Graphics/RectangleShape.hpp
@@ -47,7 +47,7 @@ public :
     /// \param size Size of the rectangle
     ///
     ////////////////////////////////////////////////////////////
-    RectangleShape(const Vector2f& size = Vector2f(0, 0));
+    explicit RectangleShape(const Vector2f& size = Vector2f(0, 0));
 
     ////////////////////////////////////////////////////////////
     /// \brief Set the size of the rectangle
diff --git a/src/SFML/Graphics/ConvexShape.cpp b/src/SFML/Graphics/ConvexShape.cpp
index 9367d4b15..6c6954f12 100644
--- a/src/SFML/Graphics/ConvexShape.cpp
+++ b/src/SFML/Graphics/ConvexShape.cpp
@@ -31,8 +31,9 @@
 namespace sf
 {
 ////////////////////////////////////////////////////////////
-ConvexShape::ConvexShape()
+ConvexShape::ConvexShape(unsigned int pointsCount)
 {
+    SetPointsCount(pointsCount);
 }