diff --git a/sdlpp/sdlpp_renderobject.cpp b/sdlpp/sdlpp_renderobject.cpp
index 63e28d2..e4f5b32 100644
--- a/sdlpp/sdlpp_renderobject.cpp
+++ b/sdlpp/sdlpp_renderobject.cpp
@@ -120,7 +120,7 @@ void RenderObject::addMovement( double x, double y ) {
 void RenderObject::setMovement( double x, double y ) {
     movementDirection = { x, y };
 }
-Vec2D< double > RenderObject::getMovement() {
+Vec2D< double > RenderObject::getMovement() const {
     return movementDirection;
 }
 void RenderObject::resetMovementX() {
diff --git a/sdlpp/sdlpp_renderobject.hpp b/sdlpp/sdlpp_renderobject.hpp
index 915daa6..e89ea9c 100644
--- a/sdlpp/sdlpp_renderobject.hpp
+++ b/sdlpp/sdlpp_renderobject.hpp
@@ -86,7 +86,7 @@ public:
     void setMovementSpeed( double speed );
     void addMovement( double x, double y );
     void setMovement( double x, double y );
-    Vec2D< double > getMovement();
+    Vec2D< double > getMovement() const;
     void resetMovementX();
     void resetMovementY();
     void clearColided();