diff --git a/src/FDM/YASim/ControlMap.hpp b/src/FDM/YASim/ControlMap.hpp
index 415f80532..75e553216 100644
--- a/src/FDM/YASim/ControlMap.hpp
+++ b/src/FDM/YASim/ControlMap.hpp
@@ -11,7 +11,7 @@ public:
 
     enum OutputType { THROTTLE, MIXTURE, CONDLEVER, STARTER, MAGNETOS,
 		      ADVANCE, REHEAT, PROP,
-		      BRAKE, STEER, EXTEND,
+		      BRAKE, STEER, EXTEND, HEXTEND, LEXTEND,
 		      INCIDENCE, FLAP0, FLAP1, SLAT, SPOILER, VECTOR,
                       BOOST, CASTERING, PROPPITCH, PROPFEATHER,
                       COLLECTIVE, CYCLICAIL, CYCLICELE, ROTORENGINEON,
diff --git a/src/FDM/YASim/FGFDM.cpp b/src/FDM/YASim/FGFDM.cpp
index e1fbc47b6..cc332d34d 100644
--- a/src/FDM/YASim/FGFDM.cpp
+++ b/src/FDM/YASim/FGFDM.cpp
@@ -241,6 +241,8 @@ void FGFDM::startElement(const char* name, const XMLAttributes &atts)
         g->setSpring(attrf(a, "spring", 1));
         g->setDamping(attrf(a, "damp", 1));
 	_airplane.addGear(g);
+    } else if(eq(name, "hook")) {
+    } else if(eq(name, "launchbar")) {
     } else if(eq(name, "fuselage")) {
 	float b[3];
 	v[0] = attrf(a, "ax");
@@ -772,6 +774,8 @@ int FGFDM::parseOutput(const char* name)
     if(eq(name, "BRAKE"))     return ControlMap::BRAKE;
     if(eq(name, "STEER"))     return ControlMap::STEER;
     if(eq(name, "EXTEND"))    return ControlMap::EXTEND;
+    if(eq(name, "HEXTEND"))   return ControlMap::HEXTEND;
+    if(eq(name, "LEXTEND"))   return ControlMap::LEXTEND;
     if(eq(name, "INCIDENCE")) return ControlMap::INCIDENCE;
     if(eq(name, "FLAP0"))     return ControlMap::FLAP0;
     if(eq(name, "FLAP1"))     return ControlMap::FLAP1;