diff --git a/client/windows/CMapOverview.cpp b/client/windows/CMapOverview.cpp
index 6d38721be..07a834d1e 100644
--- a/client/windows/CMapOverview.cpp
+++ b/client/windows/CMapOverview.cpp
@@ -221,7 +221,8 @@ CMapOverviewWidget::CMapOverviewWidget(CMapOverview& parent):
 	{
 		if(p.date.empty())
 		{
-			std::time_t time = boost::filesystem::last_write_time(*CResourceHandler::get()->getResourceName(ResourcePath(p.resource.getName(), p.tabType == ESelectionScreen::campaignList ? EResType::CAMPAIGN : EResType::MAP)));
+			ResourcePath path(p.resource.getName(), p.tabType == ESelectionScreen::campaignList ? EResType::CAMPAIGN : EResType::MAP);
+			std::time_t time = CResourceHandler::get()->getLastWriteTime(path);
 			w->setText(TextOperations::getFormattedDateTimeLocal(time));
 		}
 		else
diff --git a/lib/mapping/CMapInfo.cpp b/lib/mapping/CMapInfo.cpp
index cf02b4825..1350fefef 100644
--- a/lib/mapping/CMapInfo.cpp
+++ b/lib/mapping/CMapInfo.cpp
@@ -82,7 +82,7 @@ void CMapInfo::campaignInit()
 	originalFileURI = resource.getOriginalName();
 	fullFileURI = CResourceHandler::get()->getFullFileURI(resource);
 	campaign = CampaignHandler::getHeader(fileURI);
-	lastWrite = boost::filesystem::last_write_time(*CResourceHandler::get()->getResourceName(resource));
+	lastWrite = CResourceHandler::get()->getLastWriteTime(resource);
 	date = TextOperations::getFormattedDateTimeLocal(lastWrite);
 }