diff --git a/Aircraft/p51d-set.xml b/Aircraft/p51d-set.xml
index 1a8572f2e..2c07ebb48 100644
--- a/Aircraft/p51d-set.xml
+++ b/Aircraft/p51d-set.xml
@@ -94,6 +94,29 @@ March 2003 Jim Wilson, jimw@kelcomaine.com
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+ 0.0
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+ Ctrl-B
+ Toggle engine boost.
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+ property-toggle
+ /controls/engines/engine[0]/boost
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+