Index: src/mutex_noop.c
==================================================================
--- src/mutex_noop.c
+++ src/mutex_noop.c
@@ -198,9 +198,9 @@
 ** If compiled with SQLITE_MUTEX_NOOP, then the no-op mutex implementation
 ** is used regardless of the run-time threadsafety setting.
 */
 #ifdef SQLITE_MUTEX_NOOP
 sqlite3_mutex_methods const *sqlite3DefaultMutex(void){
-  return sqliteNoopMutex();
+  return sqlite3NoopMutex();
 }
 #endif /* SQLITE_MUTEX_NOOP */
 #endif /* SQLITE_MUTEX_OMIT */

Index: src/wal.c
==================================================================
--- src/wal.c
+++ src/wal.c
@@ -1669,11 +1669,11 @@
 ** and *pChanged is set to 1.
 **
 ** If the checksum cannot be verified return non-zero. If the header
 ** is read successfully and the checksum verified, return zero.
 */
-int walIndexTryHdr(Wal *pWal, int *pChanged){
+static int walIndexTryHdr(Wal *pWal, int *pChanged){
   u32 aCksum[2];                  /* Checksum on the header content */
   WalIndexHdr h1, h2;             /* Two copies of the header content */
   WalIndexHdr volatile *aHdr;     /* Header in shared memory */
 
   /* The first page of the wal-index must be mapped at this point. */