diff --git a/src/lua/LuaScriptInterface.cpp b/src/lua/LuaScriptInterface.cpp
index cf1272ea2b..27853aad5e 100644
--- a/src/lua/LuaScriptInterface.cpp
+++ b/src/lua/LuaScriptInterface.cpp
@@ -1936,9 +1936,9 @@ int LuaScriptInterface::simulation_brush(lua_State * l)
 	}
 	else
 	{
-		ui::Point size = luacon_model->GetBrush()->GetSize();
-		brushradiusX = size.X;
-		brushradiusY = size.Y;
+		ui::Point radius = luacon_model->GetBrush()->GetRadius();
+		brushradiusX = radius.X;
+		brushradiusY = radius.Y;
 	}
 	int brushID = luaL_optint(l, 5, luacon_model->GetBrushID());
 
diff --git a/src/simulation/Simulation.cpp b/src/simulation/Simulation.cpp
index 22397ae916..2b7f1a1dfb 100644
--- a/src/simulation/Simulation.cpp
+++ b/src/simulation/Simulation.cpp
@@ -5143,7 +5143,7 @@ void Simulation::CheckStacking()
 						excessive_stacking_found = 1;
 					}
 				}
-				else if (pmap_count[y][x]>1500 || (random_gen()%1600) <= (pmap_count[y][x]+100))
+				else if (pmap_count[y][x]>1500 || (unsigned int)RNG::Ref().between(0, 1599) <= (pmap_count[y][x]+100))
 				{
 					pmap_count[y][x] = pmap_count[y][x] + NPART;
 					excessive_stacking_found = true;