diff --git a/hledger-web/Hledger/Web/Handler/JournalR.hs b/hledger-web/Hledger/Web/Handler/JournalR.hs
index 54840d423..8ae91c26f 100644
--- a/hledger-web/Hledger/Web/Handler/JournalR.hs
+++ b/hledger-web/Hledger/Web/Handler/JournalR.hs
@@ -13,7 +13,7 @@ import Hledger.Web.Import
 import Hledger.Web.WebOptions
 import Hledger.Web.Widget.AddForm (addModal)
 import Hledger.Web.Widget.Common
-            (accountQuery, mixedAmountAsHtml, transactionFrag)
+            (accountQuery, mixedAmountAsHtml, transactionFragment)
 
 -- | The formatted journal view, with sidebar.
 getJournalR :: Handler Html
@@ -27,6 +27,7 @@ getJournalR = do
       title' = title <> if m /= Any then ", filtered" else ""
       acctlink a = (RegisterR, [("q", accountQuery a)])
       (_, items) = transactionsReport (reportopts_ $ cliopts_ opts) j m
+      transactionFrag = transactionFragment j
 
   defaultLayout $ do
     setTitle "journal - hledger-web"
diff --git a/hledger-web/Hledger/Web/Handler/RegisterR.hs b/hledger-web/Hledger/Web/Handler/RegisterR.hs
index 16cbc0a02..18394f1fe 100644
--- a/hledger-web/Hledger/Web/Handler/RegisterR.hs
+++ b/hledger-web/Hledger/Web/Handler/RegisterR.hs
@@ -18,7 +18,7 @@ import Hledger.Web.Import
 import Hledger.Web.WebOptions
 import Hledger.Web.Widget.AddForm (addModal)
 import Hledger.Web.Widget.Common
-             (accountQuery, mixedAmountAsHtml, transactionFrag)
+             (accountQuery, mixedAmountAsHtml, transactionFragment)
 
 -- | The main journal/account register view, with accounts sidebar.
 getRegisterR :: Handler Html
@@ -45,6 +45,7 @@ getRegisterR = do
           tail $ (", "<$xs) ++ [""]
       r@(balancelabel,items) = accountTransactionsReport ropts j m acctQuery
       balancelabel' = if isJust (inAccount qopts) then balancelabel else "Total"
+      transactionFrag = transactionFragment j
   defaultLayout $ do
     setTitle "register - hledger-web"
     $(widgetFile "register")
diff --git a/hledger-web/Hledger/Web/Widget/Common.hs b/hledger-web/Hledger/Web/Widget/Common.hs
index fd4f99c2e..73902c6c9 100644
--- a/hledger-web/Hledger/Web/Widget/Common.hs
+++ b/hledger-web/Hledger/Web/Widget/Common.hs
@@ -14,7 +14,7 @@ module Hledger.Web.Widget.Common
   , fromFormSuccess
   , writeJournalTextIfValidAndChanged
   , journalFile404
-  , transactionFrag
+  , transactionFragment
   ) where
 
 import Data.Default (def)
@@ -24,6 +24,7 @@ import Data.Semigroup ((<>))
 #endif
 import Data.Text (Text)
 import qualified Data.Text as T
+import qualified Data.HashMap.Strict as HashMap
 import System.FilePath (takeFileName)
 import Text.Blaze ((!), textValue)
 import qualified Text.Blaze.Html5 as H
@@ -106,6 +107,9 @@ mixedAmountAsHtml b _ =
       Just True -> "negative amount"
       _ -> "positive amount"
 
-transactionFrag :: Transaction -> String
-transactionFrag t =
-    printf "transaction-%s-%d" (sourceFilePath $ tsourcepos t) (tindex t)
+transactionFragment :: Journal -> Transaction -> String
+transactionFragment j =
+    let hm = HashMap.fromList $ zip (map fst $ jfiles j) [(1::Integer) ..]
+    in  \t ->
+            printf "transaction-%d-%d"
+                (hm HashMap.! sourceFilePath (tsourcepos t)) (tindex t)
diff --git a/hledger-web/hledger-web.cabal b/hledger-web/hledger-web.cabal
index 163a9a4c5..36a5dd173 100644
--- a/hledger-web/hledger-web.cabal
+++ b/hledger-web/hledger-web.cabal
@@ -185,6 +185,7 @@ library
     , time >=1.5
     , transformers
     , unix-compat
+    , unordered-containers
     , utf8-string
     , wai
     , wai-cors
diff --git a/hledger-web/package.yaml b/hledger-web/package.yaml
index 0cb331da6..2c80db9ed 100644
--- a/hledger-web/package.yaml
+++ b/hledger-web/package.yaml
@@ -130,6 +130,7 @@ library:
   - time >=1.5
   - transformers
   - unix-compat
+  - unordered-containers
   - utf8-string
   - wai
   - wai-extra