diff --git a/src/graphics/Screen.h b/src/graphics/Screen.h
index cee00f174..23828b3ee 100644
--- a/src/graphics/Screen.h
+++ b/src/graphics/Screen.h
@@ -10,7 +10,7 @@ namespace graphics
 class Screen 
 {
   public:
-    Screen(char){}
+    explicit Screen(char){}
     void onPress() {}
     void setup() {}
     void setOn(bool) {}