diff --git a/selfdrive/controls/controlsd.py b/selfdrive/controls/controlsd.py
index c50cb1baad..2b870987f7 100755
--- a/selfdrive/controls/controlsd.py
+++ b/selfdrive/controls/controlsd.py
@@ -655,7 +655,7 @@ class Controls:
     if self.CP.openpilotLongitudinalControl:
       if any(not be.pressed and be.type == ButtonType.gapAdjustCruise for be in CS.buttonEvents):
         self.personality = (self.personality - 1) % 3
-        self.params.put('LongitudinalPersonality', str(self.personality))
+        self.params.put_nonblocking('LongitudinalPersonality', str(self.personality))
 
     return CC, lac_log