diff --git a/dev-debug/dtrace/metadata.xml b/dev-debug/dtrace/metadata.xml
index f9149c67c8a0e..b3f23cd63bf7d 100644
--- a/dev-debug/dtrace/metadata.xml
+++ b/dev-debug/dtrace/metadata.xml
@@ -14,6 +14,9 @@
 			Install the testsuite for manual use. It is not suitable
 			for automatic execution within the ebuild because it
 			requires root privlieges.
+
+			BTF must be available for the running kernel at build-time
+			with this flag.
 		</flag>
 	</use>
 	<upstream>