diff --git a/Systems/a320-aerodynamics.xml b/Systems/a320-aerodynamics.xml
index 52aa6654..e5bec7ba 100644
--- a/Systems/a320-aerodynamics.xml
+++ b/Systems/a320-aerodynamics.xml
@@ -406,7 +406,7 @@
 			<product>
 				<property>aero/qbar-psf</property>
 				<property>metrics/Sw-sqft</property>
-				<property>fcs/rudder-pos-rad</property>
+				<toradians><property>hydraulics/rudder/final-deg</property></toradians>
 				<value>0.2653</value>
 			</product>
 		</function>
diff --git a/revision.txt b/revision.txt
index 704c4158..222192ce 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-4696
\ No newline at end of file
+4697
\ No newline at end of file