Index: src/loadext.c
==================================================================
--- src/loadext.c
+++ src/loadext.c
@@ -405,11 +405,14 @@
   sqlite3_strglob,
   /* Version 3.8.11 and later */
   (sqlite3_value*(*)(const sqlite3_value*))sqlite3_value_dup,
   sqlite3_value_free,
   sqlite3_result_zeroblob64,
-  sqlite3_bind_zeroblob64
+  sqlite3_bind_zeroblob64,
+  /* Version 3.8.12 and later */
+  sqlite3_value_subtype,
+  sqlite3_result_subtype
 };
 
 /*
 ** Attempt to load an SQLite extension library contained in the file
 ** zFile.  The entry point is zProc.  zProc may be 0 in which case a

Index: src/sqlite3ext.h
==================================================================
--- src/sqlite3ext.h
+++ src/sqlite3ext.h
@@ -270,10 +270,13 @@
   /* Version 3.8.11 and later */
   sqlite3_value *(*value_dup)(const sqlite3_value*);
   void (*value_free)(sqlite3_value*);
   int (*result_zeroblob64)(sqlite3_context*,sqlite3_uint64);
   int (*bind_zeroblob64)(sqlite3_stmt*, int, sqlite3_uint64);
+  /* Version 3.8.12 and later */
+  unsigned int (*value_subtype)(sqlite3_value*);
+  void (*result_subtype)(sqlite3_context*,unsigned int);
 };
 
 /*
 ** The following macros redefine the API routines so that they are
 ** redirected through the global sqlite3_api structure.
@@ -506,10 +509,13 @@
 /* Version 3.8.11 and later */
 #define sqlite3_value_dup              sqlite3_api->value_dup
 #define sqlite3_value_free             sqlite3_api->value_free
 #define sqlite3_result_zeroblob64      sqlite3_api->result_zeroblob64
 #define sqlite3_bind_zeroblob64        sqlite3_api->bind_zeroblob64
+/* Version 3.8.12 and later */
+#define sqlite3_value_subtype          sqlite3_api->value_subtype
+#define sqlite3_result_subtype         sqlite3_api->result_subtype
 #endif /* !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION) */
 
 #if !defined(SQLITE_CORE) && !defined(SQLITE_OMIT_LOAD_EXTENSION)
   /* This case when the file really is being compiled as a loadable 
   ** extension */