diff --git a/dlls/msi/database.c b/dlls/msi/database.c
index cce271769e..83b1f2ccfb 100644
--- a/dlls/msi/database.c
+++ b/dlls/msi/database.c
@@ -1206,7 +1206,7 @@ static UINT merge_diff_row(MSIRECORD *rec, LPVOID param)
     MERGETABLE *table = data->curtable;
     MERGEROW *mergerow;
     MSIQUERY *dbview;
-    MSIRECORD *row;
+    MSIRECORD *row = NULL;
     LPWSTR query;
     UINT r;