diff --git a/src/GPU3D_OpenGL.cpp b/src/GPU3D_OpenGL.cpp
index 8b9f06c5..ba9548e3 100644
--- a/src/GPU3D_OpenGL.cpp
+++ b/src/GPU3D_OpenGL.cpp
@@ -784,7 +784,7 @@ void BuildPolygons(RendererPolygon* polygons, int npolys)
 
     NumVertices = vidx;
     NumIndices = iidx;
-    NumEdgeIndices = eidx;
+    NumEdgeIndices = eidx - EdgeIndicesOffset;
 }
 
 void RenderSinglePolygon(int i)