diff --git a/rtengine/dcrop.cc b/rtengine/dcrop.cc
index 7b0eb7bd8..5d68df353 100644
--- a/rtengine/dcrop.cc
+++ b/rtengine/dcrop.cc
@@ -391,6 +391,7 @@ void Crop::fullUpdate () {
         //parent->changeSinceLast = 0;
         parent->thread->join ();
     }
+    parent->updaterThreadStart.unlock ();
 
     if (parent->plistener)
         parent->plistener->setProgressState (true);
@@ -402,8 +403,6 @@ void Crop::fullUpdate () {
     }
     updating = false;
 
-    parent->updaterThreadStart.unlock ();
-
     if (parent->plistener)
         parent->plistener->setProgressState (false);
 }