diff --git a/ark-4.8.0-missing_defs.patch b/ark-4.8.0-missing_defs.patch
new file mode 100644
index 0000000..9ce1c33
--- /dev/null
+++ b/ark-4.8.0-missing_defs.patch
@@ -0,0 +1,49 @@
+commit 5149649d5388b570871f8579aaea1703136c9460
+Author: Raphael Kubo da Costa <rakuco@FreeBSD.org>
+Date:   Thu Jan 5 00:17:26 2012 -0200
+
+    Add missing add_definition() calls.
+    
+    For some unknown reason, while the svn to git conversion work was going
+    on in branches/work/kdeutils-build-standalone, the lines adding
+    ${QT_DEFINITIONS} and ${KDE4_DEFINITIONS} to the definitions passed to
+    the compiler end up not being included in each application's
+    CMakeLists.txt.
+    
+    This was not a problem during the 4.7 series, as Dirk still packaged
+    kdeutils as a single tarball, and the top-level CMakeLists.txt used did
+    include these lines.
+    
+    The issue came to attention during the 4.8 beta/RC phase, when 32-bit
+    Linux users had problems creating tarballs with Ark: libarchive is
+    usually built in those systems with -D_FILE_OFFSET_BITS=64. This is set
+    in KDE4_DEFINITIONS, which was not being used to build Ark. struct stat
+    then had different sizes for Ark and libarchive, which caused all sorts
+    of trouble.
+    
+    Packagers might want to look at this commit and the equivalent ones to
+    the other affected kdeutils applications (filelight, kcalc, kcharselect,
+    kdf, kfloppy, kgpg, kremotecontrol, ktimer, kwallet, superkaramba and
+    sweeper) and apply them to their 4.8-RC packages.
+    
+    Sorry for the mess!
+    
+    BUG: 289307
+    FIXED-IN: 4.8.0
+    CCMAIL: release-team@kde.org
+    CCMAIL: kde-packager@kde.org
+
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 422d60e..238fb3c 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -7,6 +7,9 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
+     include( KDE4Defaults )
+     include_directories(${KDE4_INCLUDES})
+ 
++    add_definitions(${QT_DEFINITIONS} ${KDE4_DEFINITIONS})
++    add_definitions(-DQT_USE_FAST_CONCATENATION -DQT_USE_FAST_OPERATOR_PLUS)
++
+     # If definitions like -D_GNU_SOURCE are needed for these checks they
+     # should be added to _KDE4_PLATFORM_DEFINITIONS when it is originally
+     # defined outside this file.  Here we include these definitions in
diff --git a/ark.spec b/ark.spec
index 7289e3f..b09b77a 100644
--- a/ark.spec
+++ b/ark.spec
@@ -12,6 +12,10 @@ Source0: ftp://ftp.kde.org/pub/kde/unstable/%{version}/src/%{name}-%{version}.ta
 # libkerfuffle namelink_skip
 Patch50: ark-4.7.80-namelink_skip.patch
 
+## upstream patches
+# https://projects.kde.org/projects/kde/kdeutils/ark/repository/revisions/5149649d5388b570871f8579aaea1703136c9460
+Patch100: ark-4.8.0-missing_defs.patch
+
 BuildRequires: desktop-file-utils
 BuildRequires: kdelibs4-devel >= %{version}
 BuildRequires: kdebase4-devel >= %{version}
@@ -55,6 +59,7 @@ Provides:  kdeutils-ark-libs = 6:%{version}-%{release}
 %setup -q -n %{name}-%{version}
 
 %patch50 -p1 -b .namelink_skip
+%patch100 -p1 -b .missing_defs
 
 
 %build