diff --git a/Nasal/FMGC-b.nas b/Nasal/FMGC-b.nas
index b1663a54..0a5a8777 100644
--- a/Nasal/FMGC-b.nas
+++ b/Nasal/FMGC-b.nas
@@ -25,8 +25,8 @@ setlistener("/sim/signals/fdm-initialized", func {
 });
 
 var APinit = func {
-	setprop("/instrumentation/efis[0]/mfd/true-north", 0);
-	setprop("/instrumentation/efis[1]/mfd/true-north", 0);
+	setprop("/instrumentation/efis[0]/trk-selected", 0);
+	setprop("/instrumentation/efis[1]/trk-selected", 0);
 	setprop("/it-autoflight/custom/trk-fpa", 0);
 	setprop("/it-autoflight/input/kts-mach", 0);
 	setprop("/it-autoflight/input/ap1", 0);
@@ -496,8 +496,8 @@ var trkfpa_off = func {
 		setprop("/it-autoflight/input/vert", 1);
 	}
 	setprop("/it-autoflight/input/trk", 0);
-	setprop("/instrumentation/efis[0]/mfd/true-north", 0);
-	setprop("/instrumentation/efis[1]/mfd/true-north", 0);
+	setprop("/instrumentation/efis[0]/trk-selected", 0);
+	setprop("/instrumentation/efis[1]/trk-selected", 0);
 	var hed = getprop("/it-autoflight/internal/heading-error-deg");
 	if (hed >= -10 and hed <= 10 and getprop("/it-autoflight/output/lat") == 0) {
 		setprop("/it-autoflight/input/lat", 3);
@@ -510,8 +510,8 @@ var trkfpa_on = func {
 		setprop("/it-autoflight/input/vert", 5);
 	}
 	setprop("/it-autoflight/input/trk", 1);
-	setprop("/instrumentation/efis[0]/mfd/true-north", 1);
-	setprop("/instrumentation/efis[1]/mfd/true-north", 1);
+	setprop("/instrumentation/efis[0]/trk-selected", 1);
+	setprop("/instrumentation/efis[1]/trk-selected", 1);
 	var hed = getprop("/it-autoflight/internal/heading-error-deg");
 	if (hed >= -10 and hed <= 10 and getprop("/it-autoflight/output/lat") == 0) {
 		setprop("/it-autoflight/input/lat", 3);
diff --git a/Systems/fmgc-drivers.xml b/Systems/fmgc-drivers.xml
index 87482617..f6886360 100644
--- a/Systems/fmgc-drivers.xml
+++ b/Systems/fmgc-drivers.xml
@@ -33,7 +33,7 @@
 					<value>1</value>
 				</equals>
 			</condition>
-			<property>/orientation/heading-deg</property>
+			<property>/orientation/track-magnetic-deg</property>
 		</input>
 		<output>/it-autoflight/internal/heading-5-sec-ahead</output>
 		<seconds>5.0</seconds>
diff --git a/revision.txt b/revision.txt
index 4a5de231..c09fb911 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-4002
\ No newline at end of file
+4003
\ No newline at end of file