diff --git a/dll/win32/msi/dialog.c b/dll/win32/msi/dialog.c
index 7050d353bb7..97257636e5e 100644
--- a/dll/win32/msi/dialog.c
+++ b/dll/win32/msi/dialog.c
@@ -2943,8 +2943,11 @@ static UINT msi_dialog_directorylist_up( msi_dialog *dialog )
 
     /* strip off the last directory */
     ptr = PathFindFileNameW( path );
-    if (ptr != path) *(ptr - 1) = '\0';
-    PathAddBackslashW( path );
+    if (ptr != path)
+    {
+        *(ptr - 1) = '\0';
+        PathAddBackslashW( path );
+    }
 
     msi_dialog_set_property( dialog->package, prop, path );
 
diff --git a/media/doc/WINESYNC.txt b/media/doc/WINESYNC.txt
index f6614ac83a9..6528ad4e6c5 100644
--- a/media/doc/WINESYNC.txt
+++ b/media/doc/WINESYNC.txt
@@ -115,7 +115,7 @@ dll/win32/msg711.acm          # Synced to WineStaging-4.18
 dll/win32/msgsm32.acm         # Synced to WineStaging-4.0
 dll/win32/mshtml              # Synced to WineStaging-1.7.55
 dll/win32/mshtml.tlb          # Synced to WineStaging-1.7.55
-dll/win32/msi                 # Synced to WineStaging-7.3
+dll/win32/msi                 # Synced to WineStaging-7.3 (+ dialog.c synced to bbce5d014db7f023b133d6d09e6846e027586f7d)
 dll/win32/msimg32             # Synced to WineStaging-3.3
 dll/win32/msimtf              # Synced to WineStaging-4.18
 dll/win32/msisip              # Synced to WineStaging-4.18