Index: programs/mythfrontend/guidegrid.cpp
===================================================================
--- programs/mythfrontend/guidegrid.cpp	(revision 23066)
+++ programs/mythfrontend/guidegrid.cpp	(working copy)
@@ -286,7 +286,7 @@
 
     int maxchannel = max((int)GetChannelCount() - 1, 0);
     setStartChannel((int)(m_currentStartChannel) - (int)(m_channelCount / 2));
-    m_channelCount = min(m_channelCount, maxchannel + 1);
+    m_channelCount = min(m_channelCount, maxchannel);
 
     for (int y = 0; y < m_channelCount; ++y)
     {