diff --git a/setup_native/source/win32/customactions/inst_msu/inst_msu.cxx b/setup_native/source/win32/customactions/inst_msu/inst_msu.cxx
index 5dc47993a132..8adffbba6228 100644
--- a/setup_native/source/win32/customactions/inst_msu/inst_msu.cxx
+++ b/setup_native/source/win32/customactions/inst_msu/inst_msu.cxx
@@ -96,6 +96,10 @@ void RecSetString(MSIHANDLE hRec, UINT nField, LPCWSTR sVal)
     MsiRecordSetStringW(hRec, nField, sVal);
 }
 
+template <class S1, class... SOther>
+void WriteLogElem(MSIHANDLE hInst, MSIHANDLE hRec, std::ostringstream& sTmpl, UINT nField,
+                  const S1& elem, const SOther&... others);
+
 template <class Ch, class... SOther>
 void WriteLogElem(MSIHANDLE hInst, MSIHANDLE hRec, std::ostringstream& sTmpl, UINT nField,
                   const Ch* elem, const SOther&... others)
diff --git a/setup_native/source/win32/customactions/reg_dlls/reg_dlls.cxx b/setup_native/source/win32/customactions/reg_dlls/reg_dlls.cxx
index e7e7013f3471..b1e204a80d12 100644
--- a/setup_native/source/win32/customactions/reg_dlls/reg_dlls.cxx
+++ b/setup_native/source/win32/customactions/reg_dlls/reg_dlls.cxx
@@ -95,6 +95,10 @@ void RecSetString(MSIHANDLE hRec, UINT nField, LPCWSTR sVal)
     MsiRecordSetStringW(hRec, nField, sVal);
 }
 
+template <class S1, class... SOther>
+void WriteLogElem(MSIHANDLE hInst, MSIHANDLE hRec, std::ostringstream& sTmpl, UINT nField,
+                  const S1& elem, const SOther&... others);
+
 template <class Ch, class... SOther>
 void WriteLogElem(MSIHANDLE hInst, MSIHANDLE hRec, std::ostringstream& sTmpl, UINT nField,
                   const Ch* elem, const SOther&... others)