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-rw-r--r--apps/px4io/protocol.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/apps/px4io/protocol.h b/apps/px4io/protocol.h
index 96e0ca350..edc2c4bd2 100644
--- a/apps/px4io/protocol.h
+++ b/apps/px4io/protocol.h
@@ -39,6 +39,8 @@
* messages and the corresponding complexity involved.
*/
+#pragma once
+
/*
* XXX MUST BE KEPT IN SYNC WITH THE VERSION IN PX4FMU UNTIL
* TREES ARE MERGED.