diff --git a/deps/libgksu/libgksu.SlackBuild b/deps/libgksu/libgksu.SlackBuild
index c698fa4..6244aed 100644
--- a/deps/libgksu/libgksu.SlackBuild
+++ b/deps/libgksu/libgksu.SlackBuild
@@ -24,7 +24,7 @@
 
 PRGNAM=libgksu
 VERSION=${VERSION:-2.0.12}
-BUILD=${BUILD:-3}
+BUILD=${BUILD:-4}
 TAG=${TAG:-_msb}
 
 if [ -z "$ARCH" ]; then
@@ -85,7 +85,7 @@ if [ "$ARCH" = "x86_64" ]; then
   patch -p1 < $CWD/libgksu-2.0.12-x86_64-path.diff
 fi
 
-LDFLAGS="-lgtk" \
+LDFLAGS="-lgtk -lX11" \
 CFLAGS="$SLKCFLAGS" \
 CXXFLAGS="$SLKCFLAGS" \
 ./configure \