diff --git a/src/blackmisc/audio/audiosettings.cpp b/src/blackmisc/audio/audiosettings.cpp
index dde652c64..bb2120443 100644
--- a/src/blackmisc/audio/audiosettings.cpp
+++ b/src/blackmisc/audio/audiosettings.cpp
@@ -20,6 +20,8 @@ namespace BlackMisc
 {
     namespace Audio
     {
+        constexpr int CSettings::MaxAudioVolume;
+
         CSettings::CSettings()
         {
             this->initDefaultValues();