diff --git a/core/resources/l10n/messages.properties b/core/resources/l10n/messages.properties
index c3a90af56..84ab2d6a4 100644
--- a/core/resources/l10n/messages.properties
+++ b/core/resources/l10n/messages.properties
@@ -265,7 +265,7 @@ pref.dlg.opengl.lbl.useFBO = Use Off-screen Rendering
 
 pref.dlg.lbl.Positiontoinsert = Position to insert new body components:
 pref.dlg.lbl.Confirmdeletion = Confirm deletion of simulations:
-pref.dlg.checkbox.Runsimulations = Run all simulations automagically after design changes.
+pref.dlg.checkbox.Runsimulations = Run out-dated simulations when you open the simulation tab.
 pref.dlg.checkbox.Updateestimates = Update estimated flight parameters in design window
 pref.dlg.lbl.User-definedthrust = User-defined thrust curves:
 pref.dlg.lbl.Windspeed = Wind speed