diff --git a/src/starsphere/StarsphereRadio.cpp b/src/starsphere/StarsphereRadio.cpp
index 4c4162d71e3e94f4d2badc2d337246927766263e..2df045968923f7fcf0d52180e7df886294527a5b 100644
--- a/src/starsphere/StarsphereRadio.cpp
+++ b/src/starsphere/StarsphereRadio.cpp
@@ -235,7 +235,7 @@ void StarsphereRadio::generatePowerSpectrumCoordSystem(const int originX, const
 			glColor4f(1.0, 1.0, 0.0, 1.0);
 			glVertex2f(offsetX, offsetY + m_PowerSpectrumHeight);
 			glVertex2f(offsetX, offsetY);
-			glVertex2f(offsetX + m_PowerSpectrumWidth, offsetY);
+			glVertex2f(offsetX + m_PowerSpectrumWidth + 1, offsetY);
 		glEnd();
 
 		glPointSize(m_PowerSpectrumAxesWidth);