diff --git a/src/blackmisc/audio/voicesetup.h b/src/blackmisc/audio/voicesetup.h
index c439270d4..9cf9f2b00 100644
--- a/src/blackmisc/audio/voicesetup.h
+++ b/src/blackmisc/audio/voicesetup.h
@@ -38,7 +38,7 @@ namespace BlackMisc::Audio
         };
 
         //! Default constructor.
-        CVoiceSetup() {}
+        CVoiceSetup() = default;
 
         //! Setup with values
         CVoiceSetup(const QString &afvVoiceServerUrl, const QString &afvMapUrl);
diff --git a/src/blackmisc/aviation/airport.cpp b/src/blackmisc/aviation/airport.cpp
index de680bacb..34df73bce 100644
--- a/src/blackmisc/aviation/airport.cpp
+++ b/src/blackmisc/aviation/airport.cpp
@@ -24,9 +24,6 @@ BLACK_DEFINE_VALUEOBJECT_MIXINS(BlackMisc::Aviation, CAirport)
 
 namespace BlackMisc::Aviation
 {
-    CAirport::CAirport()
-    { }
-
     CAirport::CAirport(const QString &icao)  :
         m_icao(icao)
     { }
diff --git a/src/blackmisc/aviation/airport.h b/src/blackmisc/aviation/airport.h
index f53d97a9f..ba8b8109b 100644
--- a/src/blackmisc/aviation/airport.h
+++ b/src/blackmisc/aviation/airport.h
@@ -52,7 +52,7 @@ namespace BlackMisc::Aviation
         };
 
         //! Default constructor.
-        CAirport();
+        CAirport() = default;
 
         //! Simplified constructor
         CAirport(const QString &icao);
diff --git a/src/blackmisc/aviation/airportlist.cpp b/src/blackmisc/aviation/airportlist.cpp
index b6da4471c..a174b4e0b 100644
--- a/src/blackmisc/aviation/airportlist.cpp
+++ b/src/blackmisc/aviation/airportlist.cpp
@@ -18,8 +18,6 @@ BLACK_DEFINE_SEQUENCE_MIXINS(BlackMisc::Aviation, CAirport, CAirportList)
 
 namespace BlackMisc::Aviation
 {
-    CAirportList::CAirportList() { }
-
     CAirportList::CAirportList(const CSequence<CAirport> &other) :
         CSequence<CAirport>(other)
     { }
diff --git a/src/blackmisc/aviation/airportlist.h b/src/blackmisc/aviation/airportlist.h
index f60832ed6..33b27f7f9 100644
--- a/src/blackmisc/aviation/airportlist.h
+++ b/src/blackmisc/aviation/airportlist.h
@@ -37,7 +37,7 @@ namespace BlackMisc::Aviation
         using CSequence::CSequence;
 
         //! Default constructor.
-        CAirportList();
+        CAirportList() = default;
 
         //! Construct from a base class object.
         CAirportList(const CSequence<CAirport> &other);
diff --git a/src/blackmisc/network/rawfsdmessage.h b/src/blackmisc/network/rawfsdmessage.h
index 6163f8adf..c4b4a3f71 100644
--- a/src/blackmisc/network/rawfsdmessage.h
+++ b/src/blackmisc/network/rawfsdmessage.h
@@ -38,7 +38,7 @@ namespace BlackMisc::Network
         };
 
         //! Default constructor.
-        CRawFsdMessage() {}
+        CRawFsdMessage() = default;
 
         //! Constructor.
         CRawFsdMessage(const QString &rawMessage);
diff --git a/src/blackmisc/sequence.h b/src/blackmisc/sequence.h
index 997c4dcf9..f21dbcd6b 100644
--- a/src/blackmisc/sequence.h
+++ b/src/blackmisc/sequence.h
@@ -102,7 +102,7 @@ namespace BlackMisc
         //! @}
 
         //! Default constructor.
-        CSequence() {}
+        CSequence() = default;
 
         //! Initializer list constructor.
         CSequence(std::initializer_list<T> il) : m_impl(il) {}