diff --git a/src/generators/rss.cpp b/src/generators/rss.cpp
index 5c4eac9..0fb4254 100644
--- a/src/generators/rss.cpp
+++ b/src/generators/rss.cpp
@@ -45,18 +45,19 @@ using std::chrono::system_clock;
 void write_line(ostream &out, const uint8_t spaces, const string_view rsstag,
                 const string_view value)
 {
-    string endtag;
-    // If there is a space in the rsstag, use only the part up until the space
-    // for the ending rsstag.
-    const size_t pos = rsstag.find(' ');
-    if (pos == string_view::npos)
+    // clang-format off
+    const string endtag{[&rsstag]
     {
-        endtag = rsstag;
-    }
-    else
-    {
-        endtag = rsstag.substr(0, pos);
-    }
+        // If there is a space in the rsstag, use only the part up until the
+        // space for the ending RSS tag.
+        const size_t pos = rsstag.find(' ');
+        if (pos == string_view::npos)
+        {
+            return rsstag;
+        }
+        return rsstag.substr(0, pos);
+    }()};
+    // clang-format off
 
     out << string(spaces, ' ');
     out << '<' << rsstag << '>' << value << "</" << endtag << ">\n";