@@ -1607,15 +1607,15 @@ static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group,
             continue;
           }
           //Negative is to flip the normal to the correct direction
-          real_t inv_length = -1.0f / length_n;
+          real_t inv_length = -real_t(1.0) / length_n;
           n.x *= inv_length;
           n.y *= inv_length;
           n.z *= inv_length;
 
           TinyObjPoint axis_w, axis_v, axis_u;
           axis_w = n;
           TinyObjPoint a;
-          if(abs(axis_w.x) > 0.9999999) {
+          if(std::abs(axis_w.x) > real_t(0.9999999)) {
             a = TinyObjPoint(0,1,0);
           } else {
             a = TinyObjPoint(1,0,0);