diff --git a/thermopi/surfaces/dial.py b/thermopi/surfaces/dial.py
index af5ec0b..e6b3c30 100644
--- a/thermopi/surfaces/dial.py
+++ b/thermopi/surfaces/dial.py
@@ -87,6 +87,7 @@ class Surface(pygame.Surface):
                     self.quit = True
             if event.type == pygame.MOUSEBUTTONDOWN:
                 self.mouse_handler.active = True
+                self.mouse_handler.update()
                 self.mouse_handler.prev_mouse_pos = self.mouse_handler.mouse_pos
             if event.type == pygame.MOUSEBUTTONUP:
                 self.mouse_handler.active = False