diff --git a/libs/ardour/phase_control.cc b/libs/ardour/phase_control.cc
index caa82af82c..e52e1eb8eb 100644
--- a/libs/ardour/phase_control.cc
+++ b/libs/ardour/phase_control.cc
@@ -86,8 +86,9 @@ PhaseControl::set_state (XMLNode const & node, int version)
 
 	std::string str;
 	if (node.get_property (X_("phase-invert"), str)) {
-		if(str.length() != 0)
+		if(str.length() != 0) {
 			set_phase_invert (boost::dynamic_bitset<> (str));
+		}
 	}
 
 	return 0;