diff --git a/selfdrive/controls/lib/latcontrol_curvature.py b/selfdrive/controls/lib/latcontrol_curvature.py
index 4b4eb8f21..1d9eb97e4 100644
--- a/selfdrive/controls/lib/latcontrol_curvature.py
+++ b/selfdrive/controls/lib/latcontrol_curvature.py
@@ -1,3 +1,4 @@
+import math
 from cereal import log
 from openpilot.selfdrive.controls.lib.latcontrol import LatControl