diff --git a/pcbnew/zone_settings.cpp b/pcbnew/zone_settings.cpp
index a8f949e2e9..c78ec303e5 100644
--- a/pcbnew/zone_settings.cpp
+++ b/pcbnew/zone_settings.cpp
@@ -71,6 +71,7 @@ ZONE_SETTINGS::ZONE_SETTINGS()
     m_padConnection = ZONE_CONNECTION::THERMAL; // How pads are covered by copper in zone
 
     m_Zone_45_Only = false;
+    m_Locked = false;
 
     m_cornerSmoothingType = SMOOTHING_NONE;
     m_cornerRadius = 0;