diff --git a/qt/fn_test.pro b/qt/fn_test.pro
index 4e838368..5bf1ba81 100644
--- a/qt/fn_test.pro
+++ b/qt/fn_test.pro
@@ -7,6 +7,8 @@ HEADERS += pubnub_qt.h pubnub.hpp
 SOURCES += pubnub_qt.cpp pubnub.cpp fntest/pubnub_fntest_runner.cpp ../cpp/fntest/pubnub_fntest.cpp ../cpp/fntest/pubnub_fntest_basic.cpp ../cpp/fntest/pubnub_fntest_medium.cpp ../core/pubnub_ccore.c ../core/pubnub_ccore_pubsub.c ../core/pbcc_subscribe_v2.c ../core/pbcc_advanced_history.c ../core/pbcc_objects_api.c ../core/pbcc_actions_api.c ../core/pubnub_url_encode.c ../core/pubnub_assert_std.c ../core/pubnub_json_parse.c ../core/pubnub_helper.c ../lib/pbcrc32.c ../lib/pb_strnlen_s.c ../lib/pb_strncasecmp.c ../core/pubnub_memory_block.c
 win32:SOURCES += ../core/c99/snprintf.c
 
+DEFINES += PUBNUB_QT
+
 INCLUDEPATH += ../core ../cpp/fntest ..
 win32:INCLUDEPATH += ../core/c99
 DEPENDPATH += ../core
diff --git a/qt/pubnub.pro b/qt/pubnub.pro
index 55b81db0..429efe39 100644
--- a/qt/pubnub.pro
+++ b/qt/pubnub.pro
@@ -7,6 +7,8 @@ HEADERS += pubnub_qt.h pubnub_qt_sample.h
 SOURCES += pubnub_qt.cpp pubnub_qt_sample.cpp ../core/pubnub_ccore.c ../core/pubnub_ccore_pubsub.c ../core/pbcc_subscribe_v2.c ../core/pbcc_advanced_history.c ../core/pbcc_objects_api.c ../core/pbcc_actions_api.c ../core/pubnub_url_encode.c ../core/pubnub_assert_std.c ../core/pubnub_json_parse.c ../core/pubnub_helper.c ../lib/pbcrc32.c ../lib/pb_strnlen_s.c ../lib/pb_strncasecmp.c ../core/pubnub_memory_block.c ../core/pbcc_set_state.c
 win32:SOURCES += ../core/c99/snprintf.c
 
+DEFINES += PUBNUB_QT
+
 INCLUDEPATH += ..
 win32:INCLUDEPATH += ../core/c99
 DEPENDPATH += ../core
diff --git a/qt/pubnub_gui.pro b/qt/pubnub_gui.pro
index 4d9deb5a..51959eac 100644
--- a/qt/pubnub_gui.pro
+++ b/qt/pubnub_gui.pro
@@ -5,6 +5,8 @@ HEADERS += pubnub_qt.h pubnub_qt_gui_sample.h
 SOURCES += pubnub_qt.cpp pubnub_qt_gui_sample.cpp ../core/pubnub_ccore_pubsub.c ../core/pubnub_ccore.c ../core/pbcc_subscribe_v2.c ../core/pbcc_advanced_history.c ../core/pbcc_objects_api.c ../core/pbcc_actions_api.c ../core/pubnub_url_encode.c ../core/pubnub_assert_std.c ../core/pubnub_json_parse.c ../core/pubnub_helper.c ../lib/pbcrc32.c ../lib/pb_strnlen_s.c ../lib/pb_strncasecmp.c ../core/pubnub_memory_block.c ../core/pbcc_set_state.c 
 win32:SOURCES += ../core/c99/snprintf.c
 
+DEFINES += PUBNUB_QT
+
 INCLUDEPATH += .. 
 win32:INCLUDEPATH += ../core/c99
 DEPENDPATH += ../core