diff --git a/src/KeyMap.cpp b/src/KeyMap.cpp
index f779cbbf4c..8e12624304 100644
--- a/src/KeyMap.cpp
+++ b/src/KeyMap.cpp
@@ -495,7 +495,7 @@ docstring KeyMap::printBindings(FuncRequest const & func,
 		if (!firstone)
 			res << ", ";
 		res << key.print(format, untranslated);
-		firstone = true;
+		firstone = false;
 	}
 	return res.str();
 }