Index: src/main.c
==================================================================
--- src/main.c
+++ src/main.c
@@ -1217,11 +1217,11 @@
 ** A virtual database can be either a disk file (that is automatically
 ** deleted when the file is closed) or it an be held entirely in memory.
 ** The sqlite3TempInMemory() function is used to determine which.
 */
 int sqlite3BtreeFactory(
-  const sqlite3 *db,        /* Main database when opening aux otherwise 0 */
+  sqlite3 *db,              /* Main database when opening aux otherwise 0 */
   const char *zFilename,    /* Name of the file containing the BTree database */
   int omitJournal,          /* if TRUE then do not journal this file */
   int nCache,               /* How many pages in the page cache */
   int vfsFlags,             /* Flags passed through to vfsOpen */
   Btree **ppBtree           /* Pointer to new Btree object written here */

Index: src/sqliteInt.h
==================================================================
--- src/sqliteInt.h
+++ src/sqliteInt.h
@@ -2759,11 +2759,11 @@
 # define sqlite3AuthContextPush(a,b,c)
 # define sqlite3AuthContextPop(a)  ((void)(a))
 #endif
 void sqlite3Attach(Parse*, Expr*, Expr*, Expr*);
 void sqlite3Detach(Parse*, Expr*);
-int sqlite3BtreeFactory(const sqlite3 *db, const char *zFilename,
+int sqlite3BtreeFactory(sqlite3 *db, const char *zFilename,
                        int omitJournal, int nCache, int flags, Btree **ppBtree);
 int sqlite3FixInit(DbFixer*, Parse*, int, const char*, const Token*);
 int sqlite3FixSrcList(DbFixer*, SrcList*);
 int sqlite3FixSelect(DbFixer*, Select*);
 int sqlite3FixExpr(DbFixer*, Expr*);