diff --git a/source/cClientHandle.cpp b/source/cClientHandle.cpp
index 7128b925c..f31daf79e 100644
--- a/source/cClientHandle.cpp
+++ b/source/cClientHandle.cpp
@@ -261,6 +261,7 @@ void cClientHandle::Kick(const AString & a_Reason)
 
 void cClientHandle::Authenticate(void)
 {
+	ASSERT( m_Player == NULL );
 	// Spawn player (only serversided, so data is loaded)
 	m_Player = new cPlayer(this, GetUsername());