diff --git a/scripts/patchsqlite3.sh b/scripts/patchsqlite3.sh
index d6d2786..92fa190 100644
--- a/scripts/patchsqlite3.sh
+++ b/scripts/patchsqlite3.sh
@@ -17,7 +17,7 @@ die() {
 # 1) Intercept VFS pragma handling
 # 2) Add handling of KEY parameter in ATTACH statements
 sed 's/sqlite3_file_control\(.*SQLITE_FCNTL_PRAGMA\)/sqlite3mcFileControlPragma\1/' "$INPUT" \
-    | sed '/\#endif \/\* SQLITE3\_H \*\//a \ \n\/\* Function prototypes of SQLite3 Multiple Ciphers \*\/\nSQLITE_PRIVATE int sqlite3mcCheckVfs(const char*);\nSQLITE_PRIVATE int sqlite3mcFileControlPragma(sqlite3*, const char*, int, void*);\nSQLITE_PRIVATE int sqlite3mcHandleAttachKey(sqlite3*, const char*, const char*, sqlite3_value*, char**);\nSQLITE_PRIVATE int sqlite3mcHandleMainKey(sqlite3*, const char*);\ntypedef struct PgHdr PgHdrMC;\nSQLITE_PRIVATE void* sqlite3mcPagerCodec(PgHdrMC* pPg);\ntypedef struct Pager PagerMC;\nSQLITE_PRIVATE int sqlite3mcPagerHasCodec(PagerMC* pPager);\nSQLITE_PRIVATE void sqlite3mcInitMemoryMethods();\nSQLITE_PRIVATE int sqlite3mcIsBackupSupported(sqlite3*, const char*, sqlite3*, const char*);' \
+    | sed '/\#endif \/\* SQLITE3\_H \*\//a \ \n\/\* Function prototypes of SQLite3 Multiple Ciphers \*\/\nSQLITE_PRIVATE int sqlite3mcCheckVfs(const char*);\nSQLITE_PRIVATE int sqlite3mcFileControlPragma(sqlite3*, const char*, int, void*);\nSQLITE_PRIVATE int sqlite3mcHandleAttachKey(sqlite3*, const char*, const char*, sqlite3_value*, char**);\nSQLITE_PRIVATE int sqlite3mcHandleMainKey(sqlite3*, const char*);\ntypedef struct PgHdr PgHdrMC;\nSQLITE_PRIVATE void* sqlite3mcPagerCodec(PgHdrMC* pPg);\ntypedef struct Pager PagerMC;\nSQLITE_PRIVATE int sqlite3mcPagerHasCodec(PagerMC* pPager);\nSQLITE_PRIVATE void sqlite3mcInitMemoryMethods();\nSQLITE_PRIVATE int sqlite3mcIsBackupSupported(sqlite3*, const char*, sqlite3*, const char*);\nSQLITE_PRIVATE void sqlite3mcCodecGetKey(sqlite3* db, int nDb, void** zKey, int* nKey);' \
     | sed '/\#define MAX\_PATHNAME 512/c #if SQLITE3MC\_MAX\_PATHNAME \> 512\n#define MAX_PATHNAME SQLITE3MC\_MAX\_PATHNAME\n#else\n#define MAX_PATHNAME 512\n#endif' \
     | sed '/pData = pPage->pData;/c \  if( (pData = sqlite3mcPagerCodec(pPage))==0 ) return SQLITE_NOMEM_BKPT;' \
     | sed '/pData = p->pData;/c \        if( (pData = sqlite3mcPagerCodec(p))==0 ) return SQLITE_NOMEM;' \
@@ -28,4 +28,4 @@ sed 's/sqlite3_file_control\(.*SQLITE_FCNTL_PRAGMA\)/sqlite3mcFileControlPragma\
     | sed '/^  }else if( USEFETCH(pPager) ){/c \  }else if( USEFETCH(pPager) && sqlite3mcPagerHasCodec(pPager) == 0 ){' \
     | sed '/^  if( rc!=SQLITE_OK ) memset(&mem0, 0, sizeof(mem0));/a \\n  \/\* Initialize wrapper for memory management.\*\/\n  if( rc==SQLITE_OK ) {\n    sqlite3mcInitMemoryMethods();\n  }\n' \
     | sed '/Lock the source database handle./i \  \/\* Check whether databases are compatible with backup \*\/\n  if (!sqlite3mcIsBackupSupported(pSrcDb, zSrcDb, pDestDb, zDestDb)){\n    sqlite3ErrorWithMsg(pDestDb, SQLITE_ERROR, \"backup is not supported with incompatible source and target databases\");\n    return NULL;\n  }\n' \
-    | sed '/nRes = sqlite3BtreeGetRequestedReserve(pMain)/a \\n  \/\* A VACUUM cannot change the pagesize of an encrypted database. \*\/\n  if( db->nextPagesize ){\n    static void sqlite3mcCodecGetKey(sqlite3*, int, void**, int*);\n    int nKey;\n    char *zKey;\n    sqlite3mcCodecGetKey(db, iDb, (void**)&zKey, &nKey);\n    if( nKey ) db->nextPagesize = 0;\n  }' \
+    | sed '/nRes = sqlite3BtreeGetRequestedReserve(pMain)/a \\n  \/\* A VACUUM cannot change the pagesize of an encrypted database. \*\/\n  if( db->nextPagesize ){\n    extern void sqlite3mcCodecGetKey(sqlite3*, int, void**, int*);\n    int nKey;\n    char *zKey;\n    sqlite3mcCodecGetKey(db, iDb, (void**)&zKey, &nKey);\n    if( nKey ) db->nextPagesize = 0;\n  }' \
diff --git a/src/sqlite3patched.c b/src/sqlite3patched.c
index 7860c12..5f07576 100644
--- a/src/sqlite3patched.c
+++ b/src/sqlite3patched.c
@@ -11218,6 +11218,7 @@ typedef struct Pager PagerMC;
 SQLITE_PRIVATE int sqlite3mcPagerHasCodec(PagerMC* pPager);
 SQLITE_PRIVATE void sqlite3mcInitMemoryMethods();
 SQLITE_PRIVATE int sqlite3mcIsBackupSupported(sqlite3*, const char*, sqlite3*, const char*);
+SQLITE_PRIVATE void sqlite3mcCodecGetKey(sqlite3* db, int nDb, void** zKey, int* nKey);
 
 /******** Begin file sqlite3rtree.h *********/
 /*
@@ -156218,7 +156219,7 @@ SQLITE_PRIVATE SQLITE_NOINLINE int sqlite3RunVacuum(
 
   /* A VACUUM cannot change the pagesize of an encrypted database. */
   if( db->nextPagesize ){
-    static void sqlite3mcCodecGetKey(sqlite3*, int, void**, int*);
+    extern void sqlite3mcCodecGetKey(sqlite3*, int, void**, int*);
     int nKey;
     char *zKey;
     sqlite3mcCodecGetKey(db, iDb, (void**)&zKey, &nKey);