diff --git a/HISTORY b/HISTORY
index 082e58ea..944b3da2 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,7 +1,8 @@
 amath release history
 
-v1.8.1 May 1 2017
-- OpenBSD support
+v1.8.1 April 22 2017
+- OpenBSD support.
+- Fixed Haiku bug.
 
 v1.8.0 April 13 2017
 - Fixed bugs in numeral systems.
diff --git a/src/main.h b/src/main.h
index c413f410..87981adb 100644
--- a/src/main.h
+++ b/src/main.h
@@ -261,8 +261,9 @@
   \page    release_page Release history
   \section release_sec  Release history
 
-  \subsection version181 1.8.1 May 1 2017
+  \subsection version181 1.8.1 April 22 2017
   - OpenBSD support
+  - Fixed Haiku bug
 
   \subsection version180 1.8.0 April 13 2017
   - Fixed bugs in numeral systems.