diff --git a/FreeCAD.changes b/FreeCAD.changes
index 1bf9876..2143a6a 100644
--- a/FreeCAD.changes
+++ b/FreeCAD.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Jun  7 15:48:17 UTC 2020 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
+
+- Fix build with Qt 5.15, add fix_qt_5.15_build.patch
+
 -------------------------------------------------------------------
 Wed Mar 18 09:34:33 UTC 2020 - Yunhe Guo <i@guoyunhe.me>
 
diff --git a/FreeCAD.spec b/FreeCAD.spec
index b1055a1..58fde0a 100644
--- a/FreeCAD.spec
+++ b/FreeCAD.spec
@@ -33,9 +33,7 @@ Summary:        General Purpose 3D CAD Modeler
 License:        LGPL-2.0-or-later AND GPL-2.0-or-later
 Group:          Productivity/Graphics/CAD
 URL:            https://www.freecadweb.org/
-%if %{build_tar_ball}
 Source0:        %{name}-%version.tar.xz
-%endif
 # PATCH-FIX-UPSTREAM 0001-Fix-build-with-pyside2-shiboken2-5.12.1.patch -- Fix build with shiboken2/pyside2 >= 5.12.1
 Patch1:         0001-Fix-build-with-pyside2-shiboken2-5.12.1.patch
 # PATCH-FIX-OPENSUSE qt-5.14.patch
@@ -46,6 +44,8 @@ Patch4:         update-swigpyrunin-for-python-3.8.patch
 Patch5:         0001-fem-use-time.process_time-instead-of-removed-time.cl.patch
 # PATCH-FIX-OPENSUSE Use correct import for Python 3 tkinter
 Patch6:         fix_unittestgui_tkinter_py3.patch
+# PATCH-FIX-UPSTREAM https://github.com/FreeCAD/FreeCAD/pull/3558
+Patch7:         fix_qt_5.15_build.patch
 
 # Test suite fails on 32bit and I don't want to debug that anymore
 ExcludeArch:    %ix86 %arm ppc s390 s390x
@@ -76,6 +76,7 @@ BuildRequires:  glew-devel
 BuildRequires:  graphviz
 BuildRequires:  hdf5-devel
 BuildRequires:  hicolor-icon-theme
+BuildRequires:  java-devel
 # We use the internal smesh version with fixes atm
 #BuildRequires:  smesh-devel
 BuildRequires:  libXerces-c-devel
@@ -87,6 +88,8 @@ BuildRequires:  netgen-devel
 # we use upstream OpenCASCADE instead of oce-devel atm
 BuildRequires:  occt-devel
 BuildRequires:  pkg-config
+BuildRequires:  proj-devel
+BuildRequires:  sqlite3-devel
 
 %if 0%{?suse_version}
 # Qt5 & python3
diff --git a/_constraints b/_constraints
index 31a91c5..780cde6 100644
--- a/_constraints
+++ b/_constraints
@@ -2,7 +2,7 @@
 <constraints>
   <hardware>
     <disk>
-      <size unit="G">4</size>
+      <size unit="G">14</size>
     </disk>
     <memory>
       <size unit="G">5</size>
diff --git a/fix_qt_5.15_build.patch b/fix_qt_5.15_build.patch
new file mode 100644
index 0000000..5bbf75e
--- /dev/null
+++ b/fix_qt_5.15_build.patch
@@ -0,0 +1,21 @@
+From b2882c699b1444efadd9faee36855a965ac6a215 Mon Sep 17 00:00:00 2001
+From: bartoszek <bartoszek.github@bartus.33mail.com>
+Date: Thu, 4 Jun 2020 14:10:08 +0200
+Subject: [PATCH] Fix qt5:5.15.0 build.
+
+---
+ src/Mod/Image/Gui/OpenGLImageBox.cpp | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/Mod/Image/Gui/OpenGLImageBox.cpp b/src/Mod/Image/Gui/OpenGLImageBox.cpp
+index 404a1a19f1b..bb22ae0f836 100644
+--- a/src/Mod/Image/Gui/OpenGLImageBox.cpp
++++ b/src/Mod/Image/Gui/OpenGLImageBox.cpp
+@@ -26,6 +26,7 @@
+ # include <QSurfaceFormat>
+ # include <QMessageBox>
+ # include <QPainter>
++# include <QPainterPath>
+ #endif
+ 
+ #if defined(__MINGW32__)