diff --git a/src/g_shared/a_quake.cpp b/src/g_shared/a_quake.cpp
index c7290830b..38cff2d2d 100644
--- a/src/g_shared/a_quake.cpp
+++ b/src/g_shared/a_quake.cpp
@@ -68,12 +68,19 @@ void DEarthquake::Serialize (FArchive &arc)
 		m_IntensityZ = 0;
 		m_Flags = 0;
 	}
-	if (SaveVersion < 4520)
-		m_CountdownStart = 0;
 	else
 	{
 		arc << m_IntensityY << m_IntensityZ << m_Flags;
 	}
+	if (SaveVersion < 4520)
+	{
+		m_CountdownStart = 0;
+	}
+	else
+	{
+		arc << m_CountdownStart;
+	}
+	
 }
 
 //==========================================================================