diff --git a/sources/reactphysics3d/mathematics/lcp/LCPProjectedGaussSeidel.h b/sources/reactphysics3d/mathematics/lcp/LCPProjectedGaussSeidel.h
index 5d515782..3ff078e2 100644
--- a/sources/reactphysics3d/mathematics/lcp/LCPProjectedGaussSeidel.h
+++ b/sources/reactphysics3d/mathematics/lcp/LCPProjectedGaussSeidel.h
@@ -22,6 +22,7 @@
 
 // Libraries
 #include "LCPSolver.h"
+#include <map>
 
 namespace reactphysics3d {
 
@@ -35,7 +36,7 @@ namespace reactphysics3d {
 class LCPProjectedGaussSeidel : public LCPSolver {
     protected: 
 
-        void LCPProjectedGaussSeidel::computeVectorA(const Vector& lambda, uint nbConstraints, const Body*** const bodyMapping,
+        void computeVectorA(const Vector& lambda, uint nbConstraints, const Body*** const bodyMapping,
                                                      const Matrix** const B_sp, std::map<Body*, uint> bodyNumberMapping,
                                                      Vector* const a, uint nbBodies) const ;                                                       // Compute the vector a used in the solve() method