diff --git a/src/graphics/Renderer.cpp b/src/graphics/Renderer.cpp
index d002f3b7f..1d11647af 100644
--- a/src/graphics/Renderer.cpp
+++ b/src/graphics/Renderer.cpp
@@ -2003,7 +2003,7 @@ void Renderer::render_parts()
 							type = PT_PRTO;
 						else if (type == PT_PRTO)
 							type = PT_PRTI;
-						for (int z = 0; z < sim->parts_lastActiveIndex; z++)
+						for (int z = 0; z <= sim->parts_lastActiveIndex; z++)
 						{
 							if (parts[z].type == type)
 							{