diff --git a/src/Algo/Render/topoRender.cpp b/src/Algo/Render/topoRender.cpp
index 16c265fce258556e9c5d9f4c1a453f6b85f36e2e..204ab8b8f38cd53e4430ecf6c8b25510bf0b1c9b 100644
--- a/src/Algo/Render/topoRender.cpp
+++ b/src/Algo/Render/topoRender.cpp
@@ -156,7 +156,7 @@ void TopoRender::drawRelation2()
 	m_shader1->setColor(Geom::Vec4f(1.0f,0.0f,0.0f,0.0f));
 	m_shader1->enableVertexAttribs();
 
-	glDrawArrays(GL_LINES, 0, m_nbDarts*2);
+	glDrawArrays(GL_LINES, 0, m_nbRel2*2);
 
 	m_shader1->disableVertexAttribs();
 }