diff --git a/module/nyacc/README.nyacc b/module/nyacc/README.nyacc
index 0003ffa6..eb078ff8 100644
--- a/module/nyacc/README.nyacc
+++ b/module/nyacc/README.nyacc
@@ -1,4 +1,4 @@
-This is a version 0.76.3 of NYACC (Not Yet Another Compiler Compiler!).
+This is a version 0.76.4 of NYACC (Not Yet Another Compiler Compiler!).
 
 Copyright (C) 2015-2017 Matthew R. Wette
 
diff --git a/module/nyacc/lalr.scm b/module/nyacc/lalr.scm
index 537c43c6..2e888f43 100644
--- a/module/nyacc/lalr.scm
+++ b/module/nyacc/lalr.scm
@@ -50,7 +50,7 @@
   #:use-module (nyacc util)
   )
 
-(define *nyacc-version* "0.76.3")
+(define *nyacc-version* "0.76.4")
 
 
 ;; @deffn proxy-? sym rhs
diff --git a/module/nyacc/lang/c99/cpp.scm b/module/nyacc/lang/c99/cpp.scm
index 8dc1864d..898bf619 100644
--- a/module/nyacc/lang/c99/cpp.scm
+++ b/module/nyacc/lang/c99/cpp.scm
@@ -315,7 +315,7 @@
   ;; return "defined(FOO)" or "defined FOO".
   (define (scan-defined-arg)
     (let* ((ch (skip-il-ws (read-char))) (no-ec (not (char=? ch #\())))
-      (let iter ((chl (list ch)) (ch (read-char)))
+      (let iter ((chl (list ch)) (ch (skip-il-ws (read-char))))
 	(cond
 	 ((eof-object? ch)
 	  (if no-ec