diff --git a/src/regex/regc_nfa.c b/src/regex/regc_nfa.c
index 9881cd4304..5f65c8d83a 100644
--- a/src/regex/regc_nfa.c
+++ b/src/regex/regc_nfa.c
@@ -972,6 +972,13 @@ struct arc *con;
  ^ #def	COMPATIBLE	3	// compatible but not satisfied yet
  ^ static int combine(struct arc *, struct arc *);
  */
+ 
+/* FIXME Required for CW 8 on Mac since it's not in limits.h */
+#ifndef __CHAR_BIT__
+#define __CHAR_BIT__ 8
+#endif
+
+ 
 static int
 combine(con, a)
 struct arc *con;
diff --git a/src/regex/rege_dfa.c b/src/regex/rege_dfa.c
index 313892cc8f..843c5d31b2 100644
--- a/src/regex/rege_dfa.c
+++ b/src/regex/rege_dfa.c
@@ -257,6 +257,12 @@ struct dfa *d;
  ^ static struct dfa *newdfa(struct vars *, struct cnfa *,
  ^ 	struct colormap *, struct smalldfa *);
  */
+ 
+/* FIXME Required for CW 8 on Mac since it's not in limits.h */
+#ifndef __CHAR_BIT__
+#define __CHAR_BIT__ 8
+#endif 
+ 
 static struct dfa *
 newdfa(v, cnfa, cm, small)
 struct vars *v;
diff --git a/src/regex/regguts.h b/src/regex/regguts.h
index 36e5092367..be5041d920 100644
--- a/src/regex/regguts.h
+++ b/src/regex/regguts.h
@@ -37,8 +37,6 @@
  */
 #include "regcustom.h"
 
-
-
 /*
  * Things that regcustom.h might override.
  */