diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..2f88b18
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/cmake-build-debug
+/.idea
diff --git a/include/J3ML/Geometry/Shape.h b/include/J3ML/Geometry/Shape.h
index 2f73d8c..8dfb55c 100644
--- a/include/J3ML/Geometry/Shape.h
+++ b/include/J3ML/Geometry/Shape.h
@@ -13,6 +13,7 @@ namespace J3ML::Geometry
     class Shape
     {
     public:
+        virtual ~Shape() = default; //Polymorphic for dynamic_cast.
     protected:
     private:
     };
@@ -20,6 +21,7 @@ namespace J3ML::Geometry
     class Shape2D
     {
     public:
+        virtual ~Shape2D() = default;
     protected:
     private:
     };