diff --git a/Lib/test/test_signal.py b/Lib/test/test_signal.py
index ecdffa6..d30a2d6 100644
--- a/Lib/test/test_signal.py
+++ b/Lib/test/test_signal.py
@@ -60,6 +60,7 @@
     def test_strsignal(self):
         self.assertIn("Interrupt", signal.strsignal(signal.SIGINT))
         self.assertIn("Terminated", signal.strsignal(signal.SIGTERM))
+        self.assertIn("Hangup", signal.strsignal(signal.SIGHUP))
 
     # Issue 3864, unknown if this affects earlier versions of freebsd also
     def test_interprocess_signal(self):
diff --git a/Misc/NEWS.d/next/Library/2018-08-16-19-07-05.bpo-34412.NF5Jm2.rst b/Misc/NEWS.d/next/Library/2018-08-16-19-07-05.bpo-34412.NF5Jm2.rst
new file mode 100644
index 0000000..8d7320f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2018-08-16-19-07-05.bpo-34412.NF5Jm2.rst
@@ -0,0 +1 @@
+Make :func:`signal.strsignal` work on HP-UX. Patch by Michael Osipov.
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
index 9de5c2e..d120948 100644
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -530,9 +530,27 @@
         return NULL;
     }
 
-#ifdef MS_WINDOWS
-    /* Custom redefinition of POSIX signals allowed on Windows */
+#ifndef HAVE_STRSIGNAL
     switch (signalnum) {
+        /* Though being a UNIX, HP-UX does not provide strsignal(3). */
+#ifndef MS_WINDOWS
+        case SIGHUP:
+            res = "Hangup";
+            break;
+        case SIGALRM:
+            res = "Alarm clock";
+            break;
+        case SIGPIPE:
+            res = "Broken pipe";
+            break;
+        case SIGQUIT:
+            res = "Quit";
+            break;
+        case SIGCHLD:
+            res = "Child exited";
+            break;
+#endif
+        /* Custom redefinition of POSIX signals allowed on Windows. */
         case SIGINT:
             res = "Interrupt";
             break;
diff --git a/configure b/configure
index 87f3392..4de6843 100755
--- a/configure
+++ b/configure
@@ -11256,7 +11256,7 @@
  sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
  sched_rr_get_interval \
  sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
- sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
+ sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy strsignal symlinkat sync \
  sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
  truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
  wcscoll wcsftime wcsxfrm wmemcmp writev _getpty
diff --git a/configure.ac b/configure.ac
index 749303e..1e0b7f5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3448,7 +3448,7 @@
  sched_get_priority_max sched_setaffinity sched_setscheduler sched_setparam \
  sched_rr_get_interval \
  sigaction sigaltstack sigfillset siginterrupt sigpending sigrelse \
- sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
+ sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy strsignal symlinkat sync \
  sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
  truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
  wcscoll wcsftime wcsxfrm wmemcmp writev _getpty)
diff --git a/pyconfig.h.in b/pyconfig.h.in
index d80ddc0..a82c373 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -984,6 +984,9 @@
 /* Define to 1 if you have the <stropts.h> header file. */
 #undef HAVE_STROPTS_H
 
+/* Define to 1 if you have the `strsignal' function. */
+#undef HAVE_STRSIGNAL
+
 /* Define to 1 if `pw_gecos' is a member of `struct passwd'. */
 #undef HAVE_STRUCT_PASSWD_PW_GECOS