diff --git a/yagf-0.9.5-nothreads.patch b/yagf-0.9.5-nothreads.patch
new file mode 100644
index 0000000..229792c
--- /dev/null
+++ b/yagf-0.9.5-nothreads.patch
@@ -0,0 +1,12 @@
+diff -urp yagf-0.9.5/src/core/qipgrayscaleimage.cpp yagf-0.9.5-nothreads/src/core/qipgrayscaleimage.cpp
+--- yagf-0.9.5/src/core/qipgrayscaleimage.cpp	2015-02-17 07:50:24.000000000 +0600
++++ yagf-0.9.5-nothreads/src/core/qipgrayscaleimage.cpp	2017-03-22 10:06:34.427939051 +0700
+@@ -27,7 +27,7 @@
+ #include <QtConcurrentRun>
+ 
+ 
+-#define IPRIT_MULTITHREADING
++//#define IPRIT_MULTITHREADING
+ 
+ const QString fheader = QString::fromUtf8("YGF1");
+ 
diff --git a/yagf.spec b/yagf.spec
index 5524f44..0951b58 100644
--- a/yagf.spec
+++ b/yagf.spec
@@ -1,6 +1,6 @@
 Name:           yagf
 Version:        0.9.5
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Graphical front-end for cuneiform
 
 Group:          Applications/Multimedia
@@ -9,7 +9,8 @@ URL:            http://sourceforge.net/projects/yagf-ocr/
 Source:         https://downloads.sourceforge.net/yagf-ocr/files/%{name}-%{version}.tar.gz
 
 # fix .desktop file
-Patch:          yagf-0.9.1-Source-desktop.patch
+Patch1:         yagf-0.9.1-Source-desktop.patch
+Patch1:         yagf-0.9.5-nothreads.patch
 
 BuildRequires:  cmake
 BuildRequires:  desktop-file-utils
@@ -28,7 +29,8 @@ several images sequentially.
 
 %prep
 %setup -q
-%patch -p1 -b .desktop
+%patch1 -p1 -b .desktop
+%patch2 -p1 -b .nothreads
 
 # fix line brake for debug package
 dos2unix src/mainform.cpp src/mainform.h
@@ -74,6 +76,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 %{_datadir}/appdata/YAGF.appdata.xml
 
 %changelog
+* Wed Mar 22 2017 Dmitrij S. Kryzhevich <kryzhev@ispms.ru> 0.9.5-4
+- Possible fix for rhbz #1429052.
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 0.9.5-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild