diff --git a/fake-msi.c b/fake-msi.c
index 92c24e3..25a43a1 100644
--- a/fake-msi.c
+++ b/fake-msi.c
@@ -25,6 +25,11 @@ uint32_t MsiGetFileVersionW(const char16_t *filename,
     int fd = -1;
     void *mapv = MAP_FAILED;
 
+    if (version && *version_size)
+        *version = 0;
+    if (language && *language_size)
+        *language = 0;
+
     fd = open(fname, O_RDONLY);
     if (fd < 0)
         err(1, "%s: open", fname);