1 files changed, 1 insertions, 0 deletions

diff --git a/common/domain/applicationdomaintype.cpp b/common/domain/applicationdomaintype.cpp
index 6d16a3c..57d0f2d 100644
--- a/common/domain/applicationdomaintype.cpp
+++ b/common/domain/applicationdomaintype.cpp
@@ -30,6 +30,7 @@ namespace Sink {
 namespace ApplicationDomain {
 
 constexpr const char *Mail::ThreadId::name;
+constexpr const char *Mail::Folder::name;
 
 static const int foo = [] {
     QMetaType::registerEqualsComparator<Reference>();