1 files changed, 2 insertions, 2 deletions
diff --git a/acosh.c b/acosh.c
index 6953b9b37..6e626eca6 100644
--- a/acosh.c
+++ b/acosh.c
@@ -1,6 +1,6 @@
 /* mpfr_acosh -- Inverse Hyperbolic Cosine of Unsigned Integer Number
 
-Copyright (C) 2001 Free Software Foundation.
+Copyright (C) 2001-2002 Free Software Foundation.
 
 This file is part of the MPFR Library.
 
@@ -39,7 +39,7 @@ mpfr_acosh (mpfr_ptr y, mpfr_srcptr x , mp_rnd_t rnd_mode)
   if (MPFR_IS_NAN(x)) 
     {
       MPFR_SET_NAN(y); 
-      return 1; 
+      MPFR_RET_NAN;
     }
     
   comp=mpfr_cmp_ui(x,1);