diff --git a/install-32-bit-lin-win.sh b/install-32-bit-lin-win.sh
index 4eaf89b..1134212 100755
--- a/install-32-bit-lin-win.sh
+++ b/install-32-bit-lin-win.sh
@@ -2,12 +2,13 @@
 LDFLAGS="-L/opt/local/i586-mingw32msvc/lib" \
   CPPFLAGS="-I/opt/local/i586-mingw32msvc/include -DQ_OS_WIN32" \
   ./configure \
+  --with-qt-dir=/usr/local/trolltech/qt-mingw32/include \
   --prefix=/opt/local/i586-mingw32msvc \
   --build=x86_64 \
   --host=i586-mingw32msvc && \
 make && \
 sudo make install && \
 make clean && \
-./configure && \
+./configure --with-qt-dir=/usr/local/trolltech/qt/include && \
 make check && \
 sudo make install
diff --git a/install-64-and-32-bit-linux.sh b/install-64-and-32-bit-linux.sh
index 6d3f8a2..3e3bb50 100755
--- a/install-64-and-32-bit-linux.sh
+++ b/install-64-and-32-bit-linux.sh
@@ -1,5 +1,6 @@
 ./bootstrap.sh && \
 LDFLAGS="-L/usr/lib32 -m32" CXXFLAGS="-m32" ./configure \
+  --with-qt-dir=/usr/local/trolltech/qt-32bit/include \
   --libdir=/usr/local/lib32 \
   --build=x86_64 \
   --host=i386 && \
@@ -9,12 +10,13 @@ make clean && \
 LDFLAGS="-L/opt/local/i586-mingw32msvc/lib" \
   CPPFLAGS="-I/opt/local/i586-mingw32msvc/include -DQ_OS_WIN32" \
   ./configure \
+  --with-qt-dir=/usr/local/trolltech/qt-mingw32/include \
   --prefix=/opt/local/i586-mingw32msvc \
   --build=x86_64 \
   --host=i586-mingw32msvc && \
 make && \
 sudo make install && \
 make clean && \
-./configure && \
+./configure --with-qt-dir=/usr/local/trolltech/qt/include && \
 make check && \
 sudo make install