diff --git a/buglist b/buglist
index c214f92..c52ce8b 100644
--- a/buglist
+++ b/buglist
@@ -1,6 +1,6 @@
 =========================================================================
 
-bug 7258: 
+bug 7259: 
 todo 336:
 wish 1011:
 meh 5:
@@ -12,6 +12,18 @@ dup 50006:
 nonextend 60077:
 
 =========================================================================
+bug 7258: acosh(0.0) invalid argument to acosh
+
+(1) -> acosh(0.0)
+ 
+   >> Error detected within library code:
+   invalid argument to acosh
+
+(1) -> acosh(0)::Complex Float
+
+   (1)  0.6776263578 0344027125 E -20 + 1.5707963267 948966192 %i
+                                                         Type: Complex(Float)
+=========================================================================
 bug 7257: normalize(subst(asin(z),z=-1)) division by zero
 
 (1) -> normalize(subst(asin(z),z=-1))
diff --git a/changelog b/changelog
index 0f5919b..52ed933 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,5 @@
+20140615 tpd src/axiom-website/patches.html 20140615.06.tpd.patch
+20140615 tpd buglist bug 7258: acosh(0.0) invalid argument to acosh
 20140615 tpd src/axiom-website/patches.html 20140615.05.tpd.patch
 20140615 tpd buglist bug 7257: normalize(subst(asin(z),z=-1)) division by zero
 20140615 tpd src/axiom-website/patches.html 20140615.04.tpd.patch
diff --git a/src/axiom-website/patches.html b/src/axiom-website/patches.html
index e991823..b86407a 100644
--- a/src/axiom-website/patches.html
+++ b/src/axiom-website/patches.html
@@ -4468,6 +4468,8 @@ books/bookvol13.pamphlet, ps/v13llvmtoacl2.eps file rename
 buglist bug 7256: acot(-1) values differ
 <a href="patches/20140615.05.tpd.patch">20140615.05.tpd.patch</a>
 buglist bug 7257: normalize(subst(asin(z),z=-1)) division by zero
+<a href="patches/20140615.06.tpd.patch">20140615.06.tpd.patch</a>
+buglist bug 7258: acosh(0.0) invalid argument to acosh
  </body>
 </html>