diff --git a/Aircraft/c172p-jsbsim-base.xml b/Aircraft/c172p-jsbsim-base.xml
index 5d1961a40..05328cfe4 100644
--- a/Aircraft/c172p-jsbsim-base.xml
+++ b/Aircraft/c172p-jsbsim-base.xml
@@ -15,7 +15,7 @@ Common configuration for JSBSim C172P aircraft.
  <!-- trim for level cruise -->
 
  <controls>
-  <aileron-trim>-0.005</aileron-trim>
+  <aileron-trim>-0.012</aileron-trim>
   <rudder-trim>-0.025</rudder-trim>
   <magnetos>3</magnetos>
  </controls>