diff --git a/src/support/Messages.cpp b/src/support/Messages.cpp
index 94d34cabc1..842697ed53 100644
--- a/src/support/Messages.cpp
+++ b/src/support/Messages.cpp
@@ -386,7 +386,7 @@ bool Messages::available(string const & /* c */)
 	return false;
 }
 
-docstring const Messages::getIfFound(string const & m) const
+docstring const Messages::getIfFound(string const & /* m */) const
 {
 	return docstring();
 }