diff -u tulip-3.1.2/debian/changelog tulip-3.1.2/debian/changelog
--- tulip-3.1.2/debian/changelog
+++ tulip-3.1.2/debian/changelog
@@ -1,3 +1,10 @@
+tulip (3.1.2-2.3ubuntu3) oneiric; urgency=low
+
+  * debian/rules: Use Qt4 multiarch lib location. Fixes FTBFS.
+    (LP: #832796)
+
+ -- Daniel T Chen <crimsun@ubuntu.com>  Sun, 18 Sep 2011 19:39:49 -0400
+
 tulip (3.1.2-2.3ubuntu2) natty; urgency=low
 
   * debian/patches/05-ftbfs_gcc45: Fix FTBFS with gcc4.5
diff -u tulip-3.1.2/debian/rules tulip-3.1.2/debian/rules
--- tulip-3.1.2/debian/rules
+++ tulip-3.1.2/debian/rules
@@ -12,6 +12,7 @@
 LIBTULIP_SOVERSION=$(shell echo $(TULIP_VERSION) | cut -d. -f1-2)
 
 ARCH=$(shell dpkg-architecture -qDEB_BUILD_ARCH)
+DEB_HOST_MULTIARCH ?= $(shell dpkg-architecture -qDEB_HOST_MULTIARCH)
 
 # This has to be exported to make some magic below work.
 export DH_OPTIONS
@@ -24,7 +25,8 @@
 		--enable-tlprender --enable-stats-gui \
 		--with-qt-dir=/usr/share/qt4 --prefix=/usr \
 		--with-gle-includes=-I/usr/include/GL --with-gle-lib=-lgle \
-		--disable-static --with-pic
+		--disable-static --with-pic \
+		--with-qt-libraries=/usr/lib/$(DEB_HOST_MULTIARCH)
 
 #		--with-ftgl-includes=-I/usr/include/FTGL --with-ftgl-lib=-lftgl_pic