diff --git a/src/lib/3rdparty/qtsingleapplication/qtsingleapplication.h b/src/lib/3rdparty/qtsingleapplication/qtsingleapplication.h
index 035dac6df..7c0cb4ee7 100644
--- a/src/lib/3rdparty/qtsingleapplication/qtsingleapplication.h
+++ b/src/lib/3rdparty/qtsingleapplication/qtsingleapplication.h
@@ -49,25 +49,11 @@
 
 #include <QApplication>
 
+#include "qzcommon.h"
+
 class QtLocalPeer;
 
-#if defined(Q_OS_WIN)
-#  if !defined(QT_QTSINGLEAPPLICATION_EXPORT) && !defined(QT_QTSINGLEAPPLICATION_IMPORT)
-#    define QT_QTSINGLEAPPLICATION_EXPORT
-#  elif defined(QT_QTSINGLEAPPLICATION_IMPORT)
-#    if defined(QT_QTSINGLEAPPLICATION_EXPORT)
-#      undef QT_QTSINGLEAPPLICATION_EXPORT
-#    endif
-#    define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllimport)
-#  elif defined(QT_QTSINGLEAPPLICATION_EXPORT)
-#    undef QT_QTSINGLEAPPLICATION_EXPORT
-#    define QT_QTSINGLEAPPLICATION_EXPORT __declspec(dllexport)
-#  endif
-#else
-#  define QT_QTSINGLEAPPLICATION_EXPORT
-#endif
-
-class QT_QTSINGLEAPPLICATION_EXPORT QtSingleApplication : public QApplication
+class FALKON_EXPORT QtSingleApplication : public QApplication
 {
     Q_OBJECT
 
diff --git a/src/lib/CMakeLists.txt b/src/lib/CMakeLists.txt
index 118617dc5..c12300112 100644
--- a/src/lib/CMakeLists.txt
+++ b/src/lib/CMakeLists.txt
@@ -3,15 +3,10 @@ add_definitions(-DFALKON_SHAREDLIBRARY)
 set(CMAKE_CXX_STANDARD 14) # Enable C++14, with cmake >= 3.1
 set(CMAKE_CXX_EXTENSIONS OFF) # Don't enable gcc-specific extensions
 
-if (WIN32)
-add_definitions(-DQT_QTSINGLEAPPLICATION_EXPORT=)
-endif()
-
 set(SRCS
     3rdparty/qtsingleapplication/qtsingleapplication.cpp
     3rdparty/qtsingleapplication/qtlocalpeer.cpp
 )
-include_directories(${CMAKE_CURRENT_SOURCE_DIR}/3rdparty/qtsingleapplication)
 
 if(CMAKE_BUILD_TYPE STREQUAL "Debug")
     set(SRCS ${SRCS} ${CMAKE_SOURCE_DIR}/tests/modeltest/modeltest.cpp)