diff --git a/include/modules/wwan.hpp b/include/modules/wwan.hpp
index 0cbb5d8d..8b18e999 100644
--- a/include/modules/wwan.hpp
+++ b/include/modules/wwan.hpp
@@ -21,7 +21,7 @@ namespace waybar::modules {
 
   private:
 
-    const void updateCurrentModem();
+    void updateCurrentModem();
 
     util::SleeperThread thread_;
     std::string state_;