diff --git a/src/gui/C4StartupOptionsDlg.cpp b/src/gui/C4StartupOptionsDlg.cpp
index 0cf0ea48c..32e865db0 100644
--- a/src/gui/C4StartupOptionsDlg.cpp
+++ b/src/gui/C4StartupOptionsDlg.cpp
@@ -312,6 +312,7 @@ void C4StartupOptionsDlg::ControlConfigListBox::SetAssignmentSet(class C4PlayerC
 			if (def && def->GetGUIName() && *def->GetGUIName())
 			{
 				ListItem *element = new ListItem(this, assignment, set);
+				element->SetToolTip(def->GetGUIDesc());	
 				AddElement(element);
 			}
 		}