diff --git a/dlls/msi/dialog.c b/dlls/msi/dialog.c
index 28fb2e9fa5a..35a192cffe1 100644
--- a/dlls/msi/dialog.c
+++ b/dlls/msi/dialog.c
@@ -2448,6 +2448,8 @@ static void msi_dialog_vcl_add_columns( msi_dialog *dialog, msi_control *control
     static const WCHAR zero[] = {'0',0};
     static const WCHAR negative[] = {'-',0};
 
+    if (!text) return;
+
     while ((begin = strchrW( begin, '{' )) && count < 5)
     {
         if (!(end = strchrW( begin, '}' )))