diff --git a/src/body.hpp b/src/body.hpp
index e291512..786ffc2 100644
--- a/src/body.hpp
+++ b/src/body.hpp
@@ -30,6 +30,8 @@ public:
     // Setters
     void setAcceleration(const Acceleration& new_A) { A = new_A; }
     
+    void addAcceleration(const Acceleration& new_A);
+    
     // String representation
     std::string toString() const;