diff --git a/glib/gstdio.c b/glib/gstdio.c
index c04b6c28c..45180eba8 100644
--- a/glib/gstdio.c
+++ b/glib/gstdio.c
@@ -760,7 +760,7 @@ _g_win32_stat_utf8 (const gchar       *filename,
     len--;
 
   if (len <= 0 ||
-      (g_path_is_absolute (filename) && len <= g_path_skip_root (filename) - filename))
+      (g_path_is_absolute (filename) && len <= (gsize) (g_path_skip_root (filename) - filename)))
     len = strlen (filename);
 
   wfilename = g_utf8_to_utf16 (filename, len, NULL, NULL, NULL);
@@ -893,7 +893,7 @@ g_win32_readlink_utf8 (const gchar  *filename,
       return tmp_len;
     }
 
-  if (tmp_len > buf_size)
+  if ((gsize) tmp_len > buf_size)
     tmp_len = buf_size;
 
   memcpy (buf, tmp, tmp_len);