diff --git a/interfaces/interfaces.cpp b/interfaces/interfaces.cpp
index b71c69b2..f6677eec 100644
--- a/interfaces/interfaces.cpp
+++ b/interfaces/interfaces.cpp
@@ -34,6 +34,7 @@ ISteamAudio *g_pSteamAudio;
 IP4 *g_pP4;
 ILocalize *g_pLocalize;
 IMediaFoundation *g_pMediaFoundation;
+IGameTypes *g_pGameTypes;
 IAvi *g_pAVI;
 IBik *g_pBIK;
 IMeshSystem *g_pMeshSystem;
diff --git a/public/interfaces/interfaces.h b/public/interfaces/interfaces.h
index cc0bda01..5953b579 100644
--- a/public/interfaces/interfaces.h
+++ b/public/interfaces/interfaces.h
@@ -243,6 +243,7 @@ class IGameResourceService;
 class IVEngineClient2;
 class IVEngineServer2;
 class INetworkStringTableContainer;
+class IGameTypes;
 
 class IPanoramaUIEngine;
 class IPanoramaUIClient;
@@ -331,6 +332,9 @@ DECLARE_TIER2_INTERFACE( ILocalize, g_pLocalize );
 #define MEDIA_FOUNDATION_INTERFACE_VERSION			"VMediaFoundation001"
 DECLARE_TIER2_INTERFACE( IMediaFoundation, g_pMediaFoundation );
 
+#define GAMETYPES_INTERFACE_VERSION			"GameTypes001"
+DECLARE_TIER2_INTERFACE(IGameTypes, g_pGameTypes);
+
 #define AVI_INTERFACE_VERSION					"VAvi001"
 DECLARE_TIER3_INTERFACE( IAvi, g_pAVI );