diff --git a/debian/control.in b/debian/control.in
index 5575cfd..e16b122 100644
--- a/debian/control.in
+++ b/debian/control.in
@@ -1,7 +1,7 @@
 Source: @PACKAGE_NAME@
 Priority: extra
 Maintainer: @AUTHOR@
-Build-Depends: debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, libssl-dev, libpkcs11-helper1-dev, libpcsclite-dev, mrw-c++-dev, qtbase5-dev
+Build-Depends: debhelper (>= 7), pkg-config, autotools-dev, doxygen, graphviz, lsb-release, libssl-dev, libpkcs11-helper1-dev, libpcsclite-dev, mrw-c++-dev, qtbase5-dev | libqt4-dev
 Standards-Version: 3.8.1
 Section: libs
 Homepage: https://dev.marc.waeckerlin.org/projects/libpcscxx
diff --git a/doc/doxyfile.in b/doc/doxyfile.in
index 55e9cd3..0c8e1c1 100644
--- a/doc/doxyfile.in
+++ b/doc/doxyfile.in
@@ -1730,7 +1730,7 @@ INTERACTIVE_SVG        = YES
 # The tag DOT_PATH can be used to specify the path where the dot tool can be 
 # found. If left blank, it is assumed the dot tool can be found in the path.
 
-DOT_PATH               = /usr/bin/dot
+DOT_PATH               = 
 
 # The DOTFILE_DIRS tag can be used to specify one or more directories that 
 # contain dot files that are included in the documentation (see the