diff --git a/powerline/lib/threaded.py b/powerline/lib/threaded.py
index a9347553..89c69e93 100644
--- a/powerline/lib/threaded.py
+++ b/powerline/lib/threaded.py
@@ -72,7 +72,9 @@ class ThreadedSegment(object):
 			self.set_interval(interval)
 		# Without this we will not have to wait long until receiving bug “I 
 		# opened vim, but branch information is only shown after I move cursor”.
-		if self.update_first:
+		#
+		# If running once .update() is called in __call__.
+		if self.update_first and not self.run_once:
 			self.update_first = False
 			self.update()
 
@@ -115,7 +117,7 @@ class KwThreadedSegment(ThreadedSegment):
 		except KeyError:
 			# self.update_missing has the same reasoning as self.update_first in 
 			# parent class
-			update_state = self.compute_state(key) if self.update_missing else None
+			update_state = self.compute_state(key) if self.update_missing or self.run_once else None
 		# No locks: render method is already running with write_lock acquired.
 		self.queries[key] = (monotonic(), update_state)
 		return self.render_one(update_state, **kwargs)
@@ -138,7 +140,7 @@ class KwThreadedSegment(ThreadedSegment):
 			self.set_interval(interval)
 
 		key = self.key(**kwargs)
-		if key not in self.queries:
+		if not self.run_once and key not in self.queries:
 			self.queries[key] = (monotonic(), self.compute_state(key) if self.update_missing else None)
 
 	@staticmethod