diff --git a/conf/airframes/esden/lisa_asctec.xml b/conf/airframes/esden/lisa_asctec.xml
index c02c7b29e7..fe79ef885e 100644
--- a/conf/airframes/esden/lisa_asctec.xml
+++ b/conf/airframes/esden/lisa_asctec.xml
@@ -27,7 +27,7 @@
     <define name="SCALE" value="256"/>
     <define name="ROLL_COEF"   value="{  0  ,    0,  256, -256 }"/>
     <define name="PITCH_COEF"  value="{  256, -256,    0,    0 }"/>
-    <define name="YAW_COEF"    value="{  256,  256, -256, -256 }"/>
+    <define name="YAW_COEF"    value="{ -256, -256,  256,  256 }"/>
     <define name="THRUST_COEF" value="{  256,  256,  256,  256 }"/>
   </section>