diff --git a/sp/src/game/server/hl2/ai_behavior_functank.cpp b/sp/src/game/server/hl2/ai_behavior_functank.cpp
index 89f79228..105bf6e2 100644
--- a/sp/src/game/server/hl2/ai_behavior_functank.cpp
+++ b/sp/src/game/server/hl2/ai_behavior_functank.cpp
@@ -190,6 +190,24 @@ int	CAI_FuncTankBehavior::SelectSchedule()
 	return SCHED_IDLE_STAND;
 }
 
+//-----------------------------------------------------------------------------
+// Purpose:
+//-----------------------------------------------------------------------------
+void CAI_FuncTankBehavior::ModifyOrAppendCriteria( AI_CriteriaSet &set )
+{
+	BaseClass::ModifyOrAppendCriteria( set );
+
+#ifdef MAPBASE
+	set.AppendCriteria( "ft_mounted", m_bMounted ? "1" : "0" );
+
+	if (m_hFuncTank)
+	{
+		set.AppendCriteria( "ft_classname", m_hFuncTank->GetClassname() );
+		m_hFuncTank->AppendContextToCriteria( set, "ft_" );
+	}
+#endif
+}
+
 //-----------------------------------------------------------------------------
 // Purpose: 
 // Input  : activity - 
diff --git a/sp/src/game/server/hl2/ai_behavior_functank.h b/sp/src/game/server/hl2/ai_behavior_functank.h
index 75d5b8df..54f91d1f 100644
--- a/sp/src/game/server/hl2/ai_behavior_functank.h
+++ b/sp/src/game/server/hl2/ai_behavior_functank.h
@@ -55,6 +55,8 @@ public:
 	bool		CanManTank( CFuncTank *pTank, bool bForced );
 #endif
 
+	void		ModifyOrAppendCriteria( AI_CriteriaSet &set );
+
 	Activity	NPC_TranslateActivity( Activity activity );
 
 	// Conditions: