diff --git a/gnu/local.mk b/gnu/local.mk
index d40b1963db..be435c5288 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -1162,6 +1162,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/tophat-build-with-later-seqan.patch	\
   %D%/packages/patches/totem-meson-easy-codec.patch		\
   %D%/packages/patches/tuxpaint-stamps-path.patch		\
+  %D%/packages/patches/twinkle-include-qregexpvalidator.patch	\
   %D%/packages/patches/unrtf-CVE-2016-10091.patch		\
   %D%/packages/patches/unzip-CVE-2014-8139.patch		\
   %D%/packages/patches/unzip-CVE-2014-8140.patch		\
diff --git a/gnu/packages/patches/twinkle-include-qregexpvalidator.patch b/gnu/packages/patches/twinkle-include-qregexpvalidator.patch
new file mode 100755
index 0000000000..4096cc8712
--- /dev/null
+++ b/gnu/packages/patches/twinkle-include-qregexpvalidator.patch
@@ -0,0 +1,123 @@
+Copied from upstream:
+
+https://github.com/LubosD/twinkle/commit/4b42755619011c117a76bdf98e417ebedc47e319
+
+From 4b42755619011c117a76bdf98e417ebedc47e319 Mon Sep 17 00:00:00 2001
+From: Michal Kubecek <mkubecek@suse.cz>
+Date: Wed, 6 Jun 2018 10:07:21 +0200
+Subject: [PATCH] Include <QRegExpValidator> explicitly
+
+Since Qt 5.11, generated ui_getprofilename.h no longer includes QHeaderView
+which breaks the chain that included qvalidator.h in getprofilename.cpp.
+As it feels rather fragile to rely on such indirect includes, let's include
+<QRegExpValidator> explicitly in each file using QRegExpValidator class.
+---
+ src/gui/diamondcardprofileform.cpp | 1 +
+ src/gui/getprofilenameform.cpp     | 2 +-
+ src/gui/inviteform.cpp             | 1 +
+ src/gui/mphoneform.cpp             | 1 +
+ src/gui/numberconversionform.cpp   | 1 +
+ src/gui/syssettingsform.cpp        | 1 +
+ src/gui/userprofileform.cpp        | 1 +
+ src/gui/wizardform.cpp             | 1 +
+ 8 files changed, 8 insertions(+), 1 deletion(-)
+
+diff --git a/src/gui/diamondcardprofileform.cpp b/src/gui/diamondcardprofileform.cpp
+index 6656909..517180b 100644
+--- a/src/gui/diamondcardprofileform.cpp
++++ b/src/gui/diamondcardprofileform.cpp
+@@ -21,6 +21,7 @@
+ 
+ #include <QRegExp>
+ #include <QValidator>
++#include <QRegExpValidator>
+ #include "gui.h"
+ #include "diamondcard.h"
+ #include "getprofilenameform.h"
+diff --git a/src/gui/getprofilenameform.cpp b/src/gui/getprofilenameform.cpp
+index 1319e1d..89c715e 100644
+--- a/src/gui/getprofilenameform.cpp
++++ b/src/gui/getprofilenameform.cpp
+@@ -1,7 +1,7 @@
+ #include "getprofilenameform.h"
+-
+ #include <QDir>
+ #include <QMessageBox>
++#include <QRegExpValidator>
+ #include "user.h"
+ #include "protocol.h"
+ 
+diff --git a/src/gui/inviteform.cpp b/src/gui/inviteform.cpp
+index 433fb22..2a5b68d 100644
+--- a/src/gui/inviteform.cpp
++++ b/src/gui/inviteform.cpp
+@@ -7,6 +7,7 @@
+ #include "sys_settings.h"
+ #include <QRegExp>
+ #include <QValidator>
++#include <QRegExpValidator>
+ 
+ /*
+     Copyright (C) 2005-2009  Michel de Boer <michel@twinklephone.com>
+diff --git a/src/gui/mphoneform.cpp b/src/gui/mphoneform.cpp
+index 260fda7..c4e3c1d 100644
+--- a/src/gui/mphoneform.cpp
++++ b/src/gui/mphoneform.cpp
+@@ -54,6 +54,7 @@
+ #include <QRegExp>
+ #include <QValidator>
+ #include <QSettings>
++#include <QRegExpValidator>
+ #include "buddyform.h"
+ #include "diamondcardprofileform.h"
+ #include "osd.h"
+diff --git a/src/gui/numberconversionform.cpp b/src/gui/numberconversionform.cpp
+index f8ae64c..8481a9b 100644
+--- a/src/gui/numberconversionform.cpp
++++ b/src/gui/numberconversionform.cpp
+@@ -1,5 +1,6 @@
+ #include "numberconversionform.h"
+ 
++#include <QRegExpValidator>
+ #include "gui.h"
+ 
+ /*
+diff --git a/src/gui/syssettingsform.cpp b/src/gui/syssettingsform.cpp
+index 216af54..355df59 100644
+--- a/src/gui/syssettingsform.cpp
++++ b/src/gui/syssettingsform.cpp
+@@ -28,6 +28,7 @@
+ #include "twinkle_config.h"
+ #include <QRegExp>
+ #include <QValidator>
++#include <QRegExpValidator>
+ #include "syssettingsform.h"
+ /*
+  *  Constructs a SysSettingsForm as a child of 'parent', with the
+diff --git a/src/gui/userprofileform.cpp b/src/gui/userprofileform.cpp
+index 28700a6..9ed9209 100644
+--- a/src/gui/userprofileform.cpp
++++ b/src/gui/userprofileform.cpp
+@@ -31,6 +31,7 @@
+ #include <QStringList>
+ #include "twinkle_config.h"
+ #include <QListWidget>
++#include <QRegExpValidator>
+ #include "numberconversionform.h"
+ #include "util.h"
+ #include "userprofileform.h"
+diff --git a/src/gui/wizardform.cpp b/src/gui/wizardform.cpp
+index 777aa12..f925875 100644
+--- a/src/gui/wizardform.cpp
++++ b/src/gui/wizardform.cpp
+@@ -23,6 +23,7 @@
+ #include <QTextStream>
+ #include "gui.h"
+ #include <QFile>
++#include <QRegExpValidator>
+ #include "wizardform.h"
+ 
+ #define PROV_NONE	QT_TRANSLATE_NOOP("WizardForm", "None (direct IP to IP calls)")
+-- 
+2.17.0
+
diff --git a/gnu/packages/telephony.scm b/gnu/packages/telephony.scm
index 246d85901c..2055034117 100644
--- a/gnu/packages/telephony.scm
+++ b/gnu/packages/telephony.scm
@@ -485,6 +485,8 @@ Mumble consists of two applications for separate usage:
              (uri (git-reference
                    (url "https://github.com/LubosD/twinkle")
                    (commit commit)))
+             (patches
+              (search-patches "twinkle-include-qregexpvalidator.patch"))
              (file-name (git-file-name name version))
              (sha256
               (base32