diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,15 +35,12 @@
 set_package_properties(Canberra PROPERTIES
     PURPOSE "Needed to preview notification sounds"
     TYPE OPTIONAL)
-if (Canberra_FOUND)
-    add_definitions(-DHAVE_CANBERRA)
-else()
+if (NOT Canberra_FOUND)
     # This is REQUIRED since you cannot tell CMake "either one of those two optional ones are required"
     find_package(Phonon4Qt5 4.6.60 NO_MODULE REQUIRED)
     set_package_properties(Phonon4Qt5 PROPERTIES
         DESCRIPTION "Qt-based audio library"
         PURPOSE "Needed to preview notification sounds when Canberra isn't available")
-    add_definitions(-DHAVE_PHONON4QT5)
 endif()
 
 # Includes
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,3 +1,4 @@
+set(HAVE_CANBERRA ${Canberra_FOUND})
 set(HAVE_PHONON ${Phonon4Qt5_FOUND})
 configure_file(knotify-config.h.cmake ${CMAKE_CURRENT_BINARY_DIR}/knotify-config.h )
 
diff --git a/src/knotify-config.h.cmake b/src/knotify-config.h.cmake
--- a/src/knotify-config.h.cmake
+++ b/src/knotify-config.h.cmake
@@ -1,6 +1,7 @@
 #ifndef KNOTIFY_CONFIG_H
 #define KNOTIFY_CONFIG_H
 
+#cmakedefine HAVE_CANBERRA
 #cmakedefine HAVE_PHONON
 
 #endif /* KNOTIFY_CONFIG_H */
diff --git a/src/knotifyconfigactionswidget.h b/src/knotifyconfigactionswidget.h
--- a/src/knotifyconfigactionswidget.h
+++ b/src/knotifyconfigactionswidget.h
@@ -22,6 +22,7 @@
 
 #include <QWidget>
 #include "ui_knotifyconfigactionswidgetbase.h"
+#include "knotify-config.h"
 
 #ifdef HAVE_CANBERRA
 struct ca_context;
diff --git a/src/knotifyconfigactionswidget.cpp b/src/knotifyconfigactionswidget.cpp
--- a/src/knotifyconfigactionswidget.cpp
+++ b/src/knotifyconfigactionswidget.cpp
@@ -21,8 +21,6 @@
 #include <QDebug>
 #include <QStandardPaths>
 
-#include "knotify-config.h"
-
 #if defined(HAVE_CANBERRA)
 #include <canberra.h>
 #elif defined(HAVE_PHONON)
@@ -71,7 +69,7 @@
 
 KNotifyConfigActionsWidget::~KNotifyConfigActionsWidget()
 {
-#ifdef HAVE_CANBERRA
+#if defined(HAVE_CANBERRA)
     if (m_context) {
         ca_context_destroy(m_context);
     }