diff --git a/filters.cpp b/filters.cpp
index 8d225553..1771e8cb 100644
--- a/filters.cpp
+++ b/filters.cpp
@@ -168,7 +168,7 @@ size_t MeterFilter::PutMaybeModifiable(byte *begin, size_t length, int messageEn
 
 	while (m_length > 0 || messageEnd)
 	{
-		if (!m_rangesToSkip.empty() && m_rangesToSkip.front().message == m_totalMessages && m_currentMessageBytes + m_length > m_rangesToSkip.front().position)
+		if (m_length > 0  && !m_rangesToSkip.empty() && m_rangesToSkip.front().message == m_totalMessages && m_currentMessageBytes + m_length > m_rangesToSkip.front().position)
 		{
 			FILTER_OUTPUT_MAYBE_MODIFIABLE(1, m_begin, t = (size_t)SaturatingSubtract(m_rangesToSkip.front().position, m_currentMessageBytes), false, modifiable);