--- a/src/qtgui/recoll.pro.in
+++ b/src/qtgui/recoll.pro.in
@@ -2,7 +2,7 @@
 LANGUAGE        = C++
 
 VPATH = @srcdir@
-DEFINES += BUILDING_RECOLL
+DEFINES += BUILDING_RECOLL  TESTING_XAPIAN_SPELL
 
 @QMAKE_ENABLE_WEBKIT@ QT += webkit
 @QMAKE_DISABLE_WEBKIT@ QMAKE_CXXFLAGS += -DRESLIST_TEXTBROWSER -DSNIPPETS_TEXTBROWSER