diff --git a/c2hs/c/CLexer.x b/c2hs/c/CLexer.x
--- a/c2hs/c/CLexer.x
+++ b/c2hs/c/CLexer.x
@@ -267,6 +267,10 @@
 idkwtok ('_':'_':'i':'n':'l':'i':'n':'e':[])		     = tok CTokInline
 idkwtok ('_':'_':'i':'n':'l':'i':'n':'e':'_':'_':[])	     = tok CTokInline
 idkwtok ('i':'n':'t':[])				     = tok CTokInt
+idkwtok ('_':'_':'u':'i':'n':'t':'1':'2':'8':'_':'t':[])     = tok CTokInt
+idkwtok ('_':'_':'i':'n':'t':'1':'2':'8':'_':'t':[])	     = tok CTokInt
+idkwtok ('_':'_':'u':'i':'n':'t':'1':'2':'8':[])	     = tok CTokInt
+idkwtok ('_':'_':'i':'n':'t':'1':'2':'8':[])		     = tok CTokInt
 idkwtok ('l':'o':'n':'g':[])				     = tok CTokLong
 idkwtok ('r':'e':'g':'i':'s':'t':'e':'r':[])		     = tok CTokRegister
 idkwtok ('r':'e':'s':'t':'r':'i':'c':'t':[])		     = tok CTokRestrict
diff --git a/gtk2hs-buildtools.cabal b/gtk2hs-buildtools.cabal
--- a/gtk2hs-buildtools.cabal
+++ b/gtk2hs-buildtools.cabal
@@ -1,5 +1,5 @@
 Name:   gtk2hs-buildtools
-Version:        0.12.5.1
+Version:        0.12.5.2
 License:        GPL-2
 License-file:   COPYING
 Copyright:      (c) 2001-2010 The Gtk2Hs Team