diff --git a/src/blackmisc/timestampobjectlist.cpp b/src/blackmisc/timestampobjectlist.cpp
index cec945049..c2e2709fd 100644
--- a/src/blackmisc/timestampobjectlist.cpp
+++ b/src/blackmisc/timestampobjectlist.cpp
@@ -346,6 +346,12 @@ namespace BlackMisc
         }
     }
 
+    template<class OBJ, class CONTAINER>
+    void ITimestampObjectList<OBJ, CONTAINER>::setSortHint(HintTimestampSort hint)
+    {
+        m_tsSortHint = hint;
+    }
+
     template<class OBJ, class CONTAINER>
     MillisecondsMinMaxMean ITimestampObjectList<OBJ, CONTAINER>::getTimestampDifferenceMinMaxMean() const
     {
diff --git a/src/blackmisc/timestampobjectlist.h b/src/blackmisc/timestampobjectlist.h
index 1a85ce602..1ab845b80 100644
--- a/src/blackmisc/timestampobjectlist.h
+++ b/src/blackmisc/timestampobjectlist.h
@@ -147,7 +147,7 @@ namespace BlackMisc
         void addMsecs(qint64 msToAdd);
 
         //! Set the hint
-        void setSortHint(HintTimestampSort hint) { m_tsSortHint = hint; }
+        void setSortHint(HintTimestampSort hint);
 
         //! Difference of timestamp values
         //! \cond timestamp list has to be sorted to get meaningful values