diff --git a/ChangeLog b/ChangeLog
index 052783414..f26f67846 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,8 @@
 2006-12-15  Matthias Clasen  <mclasen@redhat.com>
 
+	* glib/gspawn.c: Undefine READ_OK to fix the build on
+	old versions of Darwin.  (#327800)
+
 	* glib/glib.symbols:
 	* glib/gstring.[hc] (g_string_chunk_clear): Add a function
 	for clearing a GStringChunk. (#364608, Matt Barnes)
diff --git a/glib/gspawn.c b/glib/gspawn.c
index 39244834c..a48b8d3a3 100644
--- a/glib/gspawn.c
+++ b/glib/gspawn.c
@@ -129,6 +129,8 @@ close_and_invalidate (gint *fd)
   return ret;
 }
 
+#undef READ_OK
+
 typedef enum
 {
   READ_FAILED = 0, /* FALSE */