1 files changed, 1 insertions, 1 deletions
diff --git a/src/wal.c b/src/wal.c
index 42ce3cb97..0b4510e17 100644
--- a/src/wal.c
+++ b/src/wal.c
@@ -753,7 +753,7 @@ static SQLITE_NOINLINE int walIndexPageRealloc(
 
   /* Enlarge the pWal->apWiData[] array if required */
   if( pWal->nWiData<=iPage ){
-    sqlite3_int64 nByte = sizeof(u32*)*(iPage+1);
+    sqlite3_int64 nByte = sizeof(u32*)*(1+(i64)iPage);
     volatile u32 **apNew;
     apNew = (volatile u32 **)sqlite3Realloc((void *)pWal->apWiData, nByte);
     if( !apNew ){