diff --git a/public/eiface.h b/public/eiface.h
index 874774fe..c98dc112 100644
--- a/public/eiface.h
+++ b/public/eiface.h
@@ -73,9 +73,14 @@ typedef struct player_info_s player_info_t;
 #define DLLEXPORT /* */
 #endif
 
+// AlliedModders - Shim until all supported mods are using the SDK Base that has this
+#if 0
 #define INTERFACEVERSION_VENGINESERVER_VERSION_21	"VEngineServer021"
 #define INTERFACEVERSION_VENGINESERVER				"VEngineServer022"
 #define INTERFACEVERSION_VENGINESERVER_INT			22
+#else
+#define INTERFACEVERSION_VENGINESERVER				"VEngineServer021"
+#endif
 
 struct bbox_t
 {
diff --git a/public/toolframework/itoolentity.h b/public/toolframework/itoolentity.h
index 8aacdd8e..aec2a929 100644
--- a/public/toolframework/itoolentity.h
+++ b/public/toolframework/itoolentity.h
@@ -245,10 +245,15 @@ public:
 typedef IServerTools IServerTools001;
 typedef IServerTools IServerTools002;
 
+// AlliedModders - Shim until all supported mods are using the SDK Base that has this
+#if 0
 #define VSERVERTOOLS_INTERFACE_VERSION_1	"VSERVERTOOLS001"
 #define VSERVERTOOLS_INTERFACE_VERSION_2	"VSERVERTOOLS002"
 #define VSERVERTOOLS_INTERFACE_VERSION		"VSERVERTOOLS003"
 #define VSERVERTOOLS_INTERFACE_VERSION_INT	3
+#else
+#define VSERVERTOOLS_INTERFACE_VERSION		"VSERVERTOOLS002"
+#endif
 
 //-----------------------------------------------------------------------------
 // Purpose: Client side tool interace (right now just handles IClientRenderables).