diff --git a/src/script/ScriptedInterface.cpp b/src/script/ScriptedInterface.cpp
index 6399ba7c6f..795a5c7889 100644
--- a/src/script/ScriptedInterface.cpp
+++ b/src/script/ScriptedInterface.cpp
@@ -188,7 +188,7 @@ struct PrintLocalVariables {
 	
 	Entity * m_entity;
 	
-	PrintLocalVariables(Entity * entity) : m_entity(entity) { }
+	explicit PrintLocalVariables(Entity * entity) : m_entity(entity) { }
 	
 };