Index: src/os_unix.c
==================================================================
--- src/os_unix.c
+++ src/os_unix.c
@@ -4872,17 +4872,17 @@
     **   "<path to db>-journal"
     **   "<path to db>-wal"
     **   "<path to db>-journalNN"
     **   "<path to db>-walNN"
     **
-    ** where NN is a 4 digit decimal number. The NN naming schemes are 
+    ** where NN is a decimal number. The NN naming schemes are 
     ** used by the test_multiplex.c module.
     */
     nDb = sqlite3Strlen30(zPath) - 1; 
 #ifdef SQLITE_ENABLE_8_3_NAMES
-    while( nDb>0 && zPath[nDb]!='-' && zPath[nDb]!='/' ) nDb--;
-    if( nDb==0 || zPath[nDb]=='/' ) return SQLITE_OK;
+    while( nDb>0 && !sqlite3Isalnum(zPath[nDb]) ) nDb--;
+    if( nDb==0 || zPath[nDb]!='-' ) return SQLITE_OK;
 #else
     while( zPath[nDb]!='-' ){
       assert( nDb>0 );
       assert( zPath[nDb]!='\n' );
       nDb--;