diff --git a/components/sud.py b/components/sud.py
index c7ea9df..93a66ca 100644
--- a/components/sud.py
+++ b/components/sud.py
@@ -140,13 +140,14 @@ class Sud(AttributeChange):
 		}
 
 	def start(self):
-		"""Starts a fresh run from IDLE, or resumes a paused one - whichever
-		applies. No-op otherwise."""
+		"""Starts a fresh run from IDLE or DONE (i.e. restarts from the
+		beginning once a previous run has finished), or resumes a paused
+		one - whichever applies. No-op otherwise."""
 		if self.state == SudState.PAUSED:
 			self.state = self._paused_from
 			self._paused_from = None
 			return
-		if self.state != SudState.IDLE:
+		if self.state not in (SudState.IDLE, SudState.DONE):
 			return
 		self.index = -1
 		self._advance()