diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1d60c3a306707803dc88fbde812de63b68ade8a5..c2b522c6cfe47628e46a0acec994895e42f58b14 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Sat Oct 30 22:42:50 1999  Stephen L Moshier <moshier@mediaone.net>
+
+	* c-lex.c (yylex): Accept 'f' in mantissa of hex float constant.
+
 Sat Oct 30 22:19:26 1999  Jeffrey A Law  (law@cygnus.com)
 
 	* fold-const.c (fold): Fix thinko when optimizing comparisons
diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index f8c9158f548c893350ac221e0f96d9f4a1da29c9..ab71f787228aca4d6065b1ab30ccec0ed4bf9606 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -1569,7 +1569,9 @@ yylex ()
 	       || (ISALNUM (c) && c != 'l' && c != 'L'
 		   && c != 'u' && c != 'U'
 		   && c != 'i' && c != 'I' && c != 'j' && c != 'J'
-		   && (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F')))))
+		   && (floatflag == NOT_FLOAT
+		       || ((base != 16) && (c != 'f') && (c != 'F'))
+		       || base == 16)))   
 	  {
 	    if (c == '.')
 	      {