diff --git a/H/Foreign.h b/H/Foreign.h
index ab123021a..df29c989e 100644
--- a/H/Foreign.h
+++ b/H/Foreign.h
@@ -99,17 +99,23 @@ typedef struct ForeignLoadItem {
 
 typedef void (*YapInitProc)(void);
 
+
+
 #ifndef STD_PROTO
 #define STD_PROTO(F,A)  F A
 #endif
 
-void STD_PROTO(Yap_FindExecutable,(char *));
-Int STD_PROTO(Yap_LoadForeign,(StringList, StringList, char *, YapInitProc *));
-Int STD_PROTO(Yap_ReLoadForeign,(StringList, StringList, char *, YapInitProc *));
+void    STD_PROTO(Yap_FindExecutable,(char *));
+void   *STD_PROTO(Yap_LoadForeignFile,(char *, int));
+int     STD_PROTO(Yap_CallForeignFile,(void *, char *));
+int     STD_PROTO(Yap_CloseForeignFile,(void *));
+Int     STD_PROTO(Yap_LoadForeign,(StringList, StringList, char *, YapInitProc *));
+Int     STD_PROTO(Yap_ReLoadForeign,(StringList, StringList, char *, YapInitProc *));
 void	STD_PROTO(Yap_ReOpenLoadForeign,(void));
 void	STD_PROTO(Yap_ShutdownLoadForeign,(void));
 
-
+#define EAGER_LOADING  1
+#define GLOBAL_LOADING 2
 
 
 
diff --git a/H/TermExt.h b/H/TermExt.h
index e4eaae4ac..320dac9a5 100644
--- a/H/TermExt.h
+++ b/H/TermExt.h
@@ -74,7 +74,9 @@ typedef enum
     EMPTY_ARENA =  0x10,
     ARRAY_INT =    0x21,
     ARRAY_FLOAT =  0x22,
-    CLAUSE_LIST =  0x40
+    CLAUSE_LIST =  0x40,
+    STRING =  0x80, /* unsupported, reserved */
+    EXTERNAL_BLOB =  0x100 /* for SWI emulation */
   } 
 big_blob_type;