diff --git a/Library/MeasurePlugin.cpp b/Library/MeasurePlugin.cpp
index a56e2727..457dcf09 100644
--- a/Library/MeasurePlugin.cpp
+++ b/Library/MeasurePlugin.cpp
@@ -219,6 +219,10 @@ void CMeasurePlugin::ReadConfig(CConfigParser& parser, const WCHAR* section)
 		{
 			m_MaxValue = 1.0;
 			m_LogMaxValue = true;
+
+			// Plugin options changed, so reset
+			m_MedianMaxValues.clear();
+			m_MedianMinValues.clear();
 		}
 		else
 		{