diff --git a/dev-debug/systemtap/systemtap-5.1.ebuild b/dev-debug/systemtap/systemtap-5.1.ebuild
index df5d1a5ea9c75..6a13a1bb981f5 100644
--- a/dev-debug/systemtap/systemtap-5.1.ebuild
+++ b/dev-debug/systemtap/systemtap-5.1.ebuild
@@ -54,6 +54,7 @@ RDEPEND="
 	acct-group/stapsys
 	acct-group/stapusr
 "
+# which: https://sourceware.org/PR32106
 BDEPEND="
 	test? (
 		dev-util/dejagnu
diff --git a/dev-debug/systemtap/systemtap-9999.ebuild b/dev-debug/systemtap/systemtap-9999.ebuild
index df5d1a5ea9c75..6a13a1bb981f5 100644
--- a/dev-debug/systemtap/systemtap-9999.ebuild
+++ b/dev-debug/systemtap/systemtap-9999.ebuild
@@ -54,6 +54,7 @@ RDEPEND="
 	acct-group/stapsys
 	acct-group/stapusr
 "
+# which: https://sourceware.org/PR32106
 BDEPEND="
 	test? (
 		dev-util/dejagnu