diff --git a/readme.md b/readme.md
index 08102cb..806cf74 100644
--- a/readme.md
+++ b/readme.md
@@ -88,9 +88,9 @@ NetSurf, Presto, Tasman, Trident, w3m, WebKit
 # Possible 'os.name'
 AIX, Amiga OS, Android, Arch, Bada, BeOS, BlackBerry, CentOS, Chromium OS,
 Contiki, Fedora, Firefox OS, FreeBSD, Debian, DragonFly, Fuchsia, Gentoo, GNU,
-Haiku, Hurd, iOS, Joli, KaiOS, Linpus, Linux, Mac OS, Maemo, Mageia, Mandriva, 
-MeeGo, Minix, Mint, Morph OS, NetBSD, Nintendo, OpenBSD, OpenVMS, OS/2, Palm, 
-PC-BSD, PCLinuxOS, Plan9, PlayStation, QNX, Raspbian, RedHat, RIM Tablet OS, 
+Haiku, HP-UX, Hurd, iOS, Joli, KaiOS, Linpus, Linux, Mac OS, Maemo, Mageia, 
+Mandriva, MeeGo, Minix, Mint, Morph OS, NetBSD, Nintendo, OpenBSD, OpenVMS, OS/2, 
+Palm, PC-BSD, PCLinuxOS, Plan9, PlayStation, QNX, Raspbian, RedHat, RIM Tablet OS, 
 RISC OS, Sailfish, Series40, Slackware, Solaris, SUSE, Symbian, Tizen, Ubuntu, 
 Unix, VectorLinux, WebOS, Windows [Phone/Mobile], Zenwalk, ...
 
diff --git a/src/ua-parser.js b/src/ua-parser.js
index 8ce831f..b7a6925 100755
--- a/src/ua-parser.js
+++ b/src/ua-parser.js
@@ -749,7 +749,7 @@
             ], [[NAME, 'Solaris'], VERSION], [
             /((?:open)?solaris)[\/\s-]?([\w\.]*)/i,                             // Solaris
             /(aix) ((\d)(?=\.|\)|\s)[\w\.])*/i,                                 // AIX
-            /(plan 9|minix|beos|os\/2|amigaos|morphos|risc os|openvms|fuchsia)/i,  // Plan9/Minix/BeOS/OS2/AmigaOS/MorphOS/RISCOS/OpenVMS/Fuchsia
+            /(plan 9|minix|beos|os\/2|amigaos|morphos|risc os|openvms|fuchsia|hp-ux)/i, // Plan9/Minix/BeOS/OS2/AmigaOS/MorphOS/RISCOS/OpenVMS/Fuchsia/HP-UX
             /(unix)\s?([\w\.]*)/i                                               // UNIX
             ], [NAME, VERSION]
         ]
diff --git a/test/os-test.json b/test/os-test.json
index 14590f3..8ba0095 100644
--- a/test/os-test.json
+++ b/test/os-test.json
@@ -997,5 +997,14 @@
             "name"    : "",
             "version" : ""
         }
+    },
+    {
+        "desc"    : "HP-UX",
+        "ua"      : "Mozilla/5.0 (X11; U; HP-UX 9000/785; es-ES; rv:1.0.1) Gecko/20020827 Netscape/7.0",
+        "expect"  :
+        {
+            "name"    : "HP-UX",
+            "version" : "undefined"
+        }
     }
 ]