diff --git a/system/unison/01-change-ocamllibdir-for-ocaml-40.patch b/system/unison/01-change-ocamllibdir-for-ocaml-40.patch
new file mode 100644
index 0000000000..b200ff87a5
--- /dev/null
+++ b/system/unison/01-change-ocamllibdir-for-ocaml-40.patch
@@ -0,0 +1,22 @@
+--- a/Makefile.OCaml	2011-04-16 17:35:38.000000000 -0300
++++ b/Makefile.OCaml	2014-09-25 13:18:43.239151396 -0300
+@@ -71,8 +71,8 @@ OCAMLLIBDIR=$(shell ocamlc -v | tail -1
+ #
+ # This should be set to an appropriate value automatically, depending
+ # on whether the lablgtk library is available
+-LABLGTKLIB=$(OCAMLLIBDIR)/lablgtk
+-LABLGTK2LIB=$(OCAMLLIBDIR)/lablgtk2
++LABLGTKLIB=$(OCAMLLIBDIR)/site-lib/lablgtk
++LABLGTK2LIB=$(OCAMLLIBDIR)/site-lib/lablgtk2
+ ##BCP [3/2007]: Removed temporarily, since the OSX UI is not working well 
+ ## at the moment and we don't want to confuse people by building it by default
+ ifeq ($(OSARCH),osx)
+@@ -92,7 +92,7 @@ buildexecutable::
+ 
+ INCLFLAGS=-I lwt -I ubase -I system
+ CAMLFLAGS+=$(INCLFLAGS)
+-CAMLFLAGS+=-I system/$(SYSTEM) -I lwt/$(SYSTEM)
++CAMLFLAGS+=-I system/$(SYSTEM) -I lwt/$(SYSTEM) -I $(LABLGTK2LIB)
+ 
+ ifeq ($(OSARCH),win32)
+   # Win32 system
diff --git a/system/unison/unison.SlackBuild b/system/unison/unison.SlackBuild
index 847a230a6c..96e1e11a65 100644
--- a/system/unison/unison.SlackBuild
+++ b/system/unison/unison.SlackBuild
@@ -23,8 +23,8 @@
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 PRGNAM=unison
-VERSION=2.40.63
-BUILD=${BUILD:-1}
+VERSION=${VERSION:-2.40.63}
+BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
@@ -53,7 +53,12 @@ find -L . \
  \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
   -o -perm 511 \) -exec chmod 755 {} \; -o \
  \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
- -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+# Apply patches
+for _p in $(ls $CWD/*.patch); do
+	patch -p1 -i $_p
+done
 
 # no need to set CFLAGS
 
@@ -73,7 +78,7 @@ make UISTYLE=$FLAVOR DEBUGGING=false THREADS=true NATIVE=true
 mkdir -p $PKG/usr/bin
 install -m 0755 $PRGNAM $PKG/usr/bin
 
-find $PKG | xargs file | grep -e "executable" -e "shared object" | grep ELF \
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
   | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
 
 mkdir -p $PKG/usr/share/applications