diff --git a/bitinspector.pro b/bitinspector.pro
index 44c3e4c..2c71f8e 100644
--- a/bitinspector.pro
+++ b/bitinspector.pro
@@ -15,6 +15,8 @@
 # You should have received a copy of the GNU General Public License along
 # with this program. If not, see http://www.gnu.org/licenses/.
 
+QT += widgets
+
 # libbitconvert and libpcre locations; if no ../pcre, use the system libpcre
 INCLUDEPATH += ../libbitconvert
 LIBS += -L../libbitconvert -lbitconvert -L../pcre -lpcre