diff --git a/src/libcalamaresui/modulesystem/Module.cpp b/src/libcalamaresui/modulesystem/Module.cpp
index 4bc759cb1..7608bd3ec 100644
--- a/src/libcalamaresui/modulesystem/Module.cpp
+++ b/src/libcalamaresui/modulesystem/Module.cpp
@@ -58,8 +58,7 @@ Module::~Module() {}
 void
 Module::initFrom( const QVariantMap& moduleDescriptor, const QString& id )
 {
-    m_name = moduleDescriptor.value( "name" ).toString();
-    m_instanceId = id;
+    m_key = ModuleSystem::InstanceKey( moduleDescriptor.value( "name" ).toString(), id );
     if ( moduleDescriptor.contains( EMERGENCY ) )
     {
         m_maybe_emergency = moduleDescriptor[ EMERGENCY ].toBool();
@@ -148,6 +147,12 @@ Module::fromDescriptor( const QVariantMap& moduleDescriptor,
     }
 
     m->initFrom( moduleDescriptor, instanceId );
+    if ( !m->m_key.isValid() )
+    {
+        cError() << "Module" << instanceId << "invalid ID";
+        return nullptr;
+    }
+    
     m->initFrom( moduleDescriptor );
     try
     {
@@ -205,7 +210,7 @@ moduleConfigurationCandidates( bool assumeBuildDir, const QString& moduleName, c
 void Module::loadConfigurationFile( const QString& configFileName )  //throws YAML::Exception
 {
     QStringList configCandidates
-        = moduleConfigurationCandidates( Settings::instance()->debugMode(), m_name, configFileName );
+        = moduleConfigurationCandidates( Settings::instance()->debugMode(), name(), configFileName );
     for ( const QString& path : configCandidates )
     {
         QFile configFile( path );
@@ -234,28 +239,7 @@ void Module::loadConfigurationFile( const QString& configFileName )  //throws YA
             return;
         }
     }
-    cDebug() << "No config file for" << m_name << "found anywhere at" << Logger::DebugList( configCandidates );
-}
-
-
-QString
-Module::name() const
-{
-    return m_name;
-}
-
-
-QString
-Module::instanceId() const
-{
-    return m_instanceId;
-}
-
-
-QString
-Module::instanceKey() const
-{
-    return QString( "%1@%2" ).arg( m_name ).arg( m_instanceId );
+    cDebug() << "No config file for" << name() << "found anywhere at" << Logger::DebugList( configCandidates );
 }
 
 
diff --git a/src/libcalamaresui/modulesystem/Module.h b/src/libcalamaresui/modulesystem/Module.h
index 03eb09cb0..d96ac152d 100644
--- a/src/libcalamaresui/modulesystem/Module.h
+++ b/src/libcalamaresui/modulesystem/Module.h
@@ -24,6 +24,8 @@
 #include "Requirement.h"
 #include "UiDllMacro.h"
 
+#include "modulesystem/InstanceKey.h"
+
 #include <QStringList>
 #include <QVariant>
 
@@ -83,13 +85,13 @@ public:
      * @brief name returns the name of this module.
      * @return a string with this module's name.
      */
-    virtual QString name() const final;
+    QString name() const { return m_key.module(); }
 
     /**
      * @brief instanceId returns the instance id of this module.
      * @return a string with this module's instance id.
      */
-    virtual QString instanceId() const final;
+    QString instanceId() const { return m_key.id(); }
 
     /**
      * @brief instanceKey returns the instance key of this module.
@@ -98,7 +100,7 @@ public:
      * For instance, "partition\@partition" (default configuration) or
      * "locale\@someconfig" (custom configuration)
      */
-    virtual QString instanceKey() const final;
+    QString instanceKey() const { return m_key.toString(); }
 
     /**
      * @brief location returns the full path of this module's directory.
@@ -188,9 +190,8 @@ protected:
 private:
     void loadConfigurationFile( const QString& configFileName );  //throws YAML::Exception
 
-    QString m_name;
     QString m_directory;
-    QString m_instanceId;
+    ModuleSystem::InstanceKey m_key;
 };
 
 }  // namespace Calamares