diff --git a/Generals/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp b/Generals/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
index d3dbb67e24b..70ac05b3f2b 100644
--- a/Generals/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
+++ b/Generals/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
@@ -2889,11 +2889,12 @@ void AIGroup::groupDoCommandButton( const CommandButton *commandButton, CommandS
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButton( commandButton, cmdSource );
 	}
@@ -2909,11 +2910,12 @@ void AIGroup::groupDoCommandButtonAtPosition( const CommandButton *commandButton
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButtonAtPosition( commandButton, pos, cmdSource );
 	}
@@ -2928,11 +2930,12 @@ void AIGroup::groupDoCommandButtonAtObject( const CommandButton *commandButton,
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButtonAtObject( commandButton, obj, cmdSource );
 	}
diff --git a/GeneralsMD/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp b/GeneralsMD/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
index effcd157c50..17f7b045bc1 100644
--- a/GeneralsMD/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
+++ b/GeneralsMD/Code/GameEngine/Source/GameLogic/AI/AIGroup.cpp
@@ -2962,11 +2962,12 @@ void AIGroup::groupDoCommandButton( const CommandButton *commandButton, CommandS
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButton( commandButton, cmdSource );
 	}
@@ -2982,11 +2983,12 @@ void AIGroup::groupDoCommandButtonAtPosition( const CommandButton *commandButton
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButtonAtPosition( commandButton, pos, cmdSource );
 	}
@@ -3001,11 +3003,12 @@ void AIGroup::groupDoCommandButtonUsingWaypoints( const CommandButton *commandBu
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButtonUsingWaypoints( commandButton, way, cmdSource );
 	}
@@ -3020,11 +3023,12 @@ void AIGroup::groupDoCommandButtonAtObject( const CommandButton *commandButton,
 	std::list<Object *>::iterator i;
 	Object *source;
 
-	for( i = m_memberList.begin(); i != m_memberList.end(); ++i )
+	for( i = m_memberList.begin(); i != m_memberList.end(); /* empty */ )
 	{
 
 		// get object
 		source = *i;
+		++i;  // Advance iterator before the call that might destroy the object
 
 		source->doCommandButtonAtObject( commandButton, obj, cmdSource );
 	}