diff --git a/Systems/libraries.xml b/Systems/libraries.xml
index 5d635c95..ac181f7e 100644
--- a/Systems/libraries.xml
+++ b/Systems/libraries.xml
@@ -31,7 +31,7 @@
 			<expression>
 				<dif>
 					<property>/position/altitude-agl-ft</property>
-					<value>15.001</value>
+					<value>14.201</value>
 				</dif>
 			</expression>
 		</input>
diff --git a/revision.txt b/revision.txt
index 61497da7..ebe7bc9a 100644
--- a/revision.txt
+++ b/revision.txt
@@ -1 +1 @@
-4754
\ No newline at end of file
+4755
\ No newline at end of file