diff --git a/Aircraft/c172p/c172p-2dpanel-set.xml b/Aircraft/c172p/c172p-2dpanel-set.xml
index af2cb412c..b4ff13c2a 100644
--- a/Aircraft/c172p/c172p-2dpanel-set.xml
+++ b/Aircraft/c172p/c172p-2dpanel-set.xml
@@ -12,13 +12,14 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
  <sim>
 
   <description>Cessna 172P Skyhawk (1981 model), 2D panel</description>
+  <variant-of>c172p</variant-of>
 
   <startup>
 			<splash-texture>Aircraft/c172p/splash.png</splash-texture>
 		</startup>
 
   <!-- Use a 2D instrument panel -->
- 
+
   <panel>
    <path>Aircraft/c172p/Panels/c172-vfr-panel.xml</path>
    <visibility archive="y">true</visibility>
diff --git a/Aircraft/c172p/c172p-canvas-set.xml b/Aircraft/c172p/c172p-canvas-set.xml
index c3e17de74..68fda512a 100644
--- a/Aircraft/c172p/c172p-canvas-set.xml
+++ b/Aircraft/c172p/c172p-canvas-set.xml
@@ -21,6 +21,7 @@ Started October 23 2001 by John Check, fgpanels@rockfish.net
     <cockpit type="int">4</cockpit>
   </rating>
 
+  <variant-of>c172p</variant-of>
 
   <flight-model archive="y">jsb</flight-model>
   <aero archive="y">c172p</aero>
diff --git a/Aircraft/c172p/c172p-panel-only-set.xml b/Aircraft/c172p/c172p-panel-only-set.xml
index 4ca480abd..764370c8f 100644
--- a/Aircraft/c172p/c172p-panel-only-set.xml
+++ b/Aircraft/c172p/c172p-panel-only-set.xml
@@ -3,7 +3,7 @@
 <PropertyList include="c172p-set.xml">
 	<sim>
 		<description>Panel only for IFR-training (Cessna 172P)</description>
-
+        <variant-of>c172p</variant-of>
  <startup>
 			<splash-texture>Aircraft/c172p/splash.png</splash-texture>
 		</startup>