diff --git a/tier1/KeyValues.cpp b/tier1/KeyValues.cpp
index a1ea25bb..897d53c0 100644
--- a/tier1/KeyValues.cpp
+++ b/tier1/KeyValues.cpp
@@ -79,7 +79,7 @@ public:
 			m_errorStack[m_errorIndex] = symName;
 		}
 		m_errorIndex++;
-		m_maxErrorIndex = max( m_maxErrorIndex, (m_errorIndex-1) );
+		m_maxErrorIndex = MAX( m_maxErrorIndex, (m_errorIndex-1) );
 		return m_errorIndex-1;
 	}