diff --git a/client/htmlfilter.cpp b/client/htmlfilter.cpp
index dbb02882..e0fc7d07 100644
--- a/client/htmlfilter.cpp
+++ b/client/htmlfilter.cpp
@@ -16,6 +16,7 @@
 #include <stack>
 
 using namespace std;
+using namespace Qt::StringLiterals;
 
 namespace HtmlFilter {