Index: src/main.c
==================================================================
--- src/main.c
+++ src/main.c
@@ -2171,11 +2171,12 @@
 **
 ** If iDb is passed SQLITE_MAX_ATTACHED, then all attached databases are
 ** checkpointed. If an error is encountered it is returned immediately -
 ** no attempt is made to checkpoint any remaining databases.
 **
-** Parameter eMode is one of SQLITE_CHECKPOINT_PASSIVE, FULL or RESTART.
+** Parameter eMode is one of SQLITE_CHECKPOINT_PASSIVE, FULL, RESTART
+** or TRUNCATE.
 */
 int sqlite3Checkpoint(sqlite3 *db, int iDb, int eMode, int *pnLog, int *pnCkpt){
   int rc = SQLITE_OK;             /* Return code */
   int i;                          /* Used to iterate through attached dbs */
   int bBusy = 0;                  /* True if SQLITE_BUSY has been encountered */