diff --git a/sp/src/game/server/ai_relationship.cpp b/sp/src/game/server/ai_relationship.cpp
index a700552a..319d5f7e 100644
--- a/sp/src/game/server/ai_relationship.cpp
+++ b/sp/src/game/server/ai_relationship.cpp
@@ -615,6 +615,9 @@ void CAI_ClassRelationship::ChangeRelationships( int disposition, int iReverting
 		return;
 	}
 
+	if ( !CBaseCombatCharacter::DefaultRelationshipsLoaded() )
+		return;
+
 	if ( m_iPreviousDisposition == -1 && iReverting == NOT_REVERTING )
 	{
 		// Set previous disposition.
diff --git a/sp/src/game/server/basecombatcharacter.cpp b/sp/src/game/server/basecombatcharacter.cpp
index 7d45ec4e..f3c9543c 100644
--- a/sp/src/game/server/basecombatcharacter.cpp
+++ b/sp/src/game/server/basecombatcharacter.cpp
@@ -3239,6 +3239,16 @@ void CBaseCombatCharacter::SetDefaultRelationship(Class_T nClass, Class_T nClass
 }
 
 #ifdef MAPBASE
+//-----------------------------------------------------------------------------
+// Purpose: Determine whether or not default relationships are loaded
+// Input  :
+// Output :
+//-----------------------------------------------------------------------------
+bool CBaseCombatCharacter::DefaultRelationshipsLoaded()
+{
+	return m_DefaultRelationship != NULL;
+}
+
 //-----------------------------------------------------------------------------
 // Purpose: Fetch the default (ignore ai_relationship changes) relationship
 // Input  :
diff --git a/sp/src/game/server/basecombatcharacter.h b/sp/src/game/server/basecombatcharacter.h
index c7eb9960..ccd5d599 100644
--- a/sp/src/game/server/basecombatcharacter.h
+++ b/sp/src/game/server/basecombatcharacter.h
@@ -462,6 +462,7 @@ public:
 	static void			AllocateDefaultRelationships( );
 	static void			SetDefaultRelationship( Class_T nClass, Class_T nClassTarget,  Disposition_t nDisposition, int nPriority );
 #ifdef MAPBASE
+	static bool			DefaultRelationshipsLoaded();
 	static Disposition_t	GetDefaultRelationshipDisposition( Class_T nClassSource, Class_T nClassTarget );
 	static int				GetDefaultRelationshipPriority( Class_T nClassSource, Class_T nClassTarget );
 	int						GetDefaultRelationshipPriority( Class_T nClassTarget );