Index: glib/gbase64.c
===================================================================
--- glib/gbase64.c	(revision 6755)
+++ glib/gbase64.c	(working copy)
@@ -368,7 +368,7 @@ g_base64_decode (const gchar *text,
 
   g_return_val_if_fail (input_length > 1, NULL);
 
-  ret = g_malloc0 (input_length * 3 / 4);
+  ret = g_malloc0 (input_length * 3 / 4 + 4);
   
   *out_len = g_base64_decode_step (text, input_length, ret, &state, &save);