diff --git a/net-mail/fdm/fdm-2.2-r3.ebuild b/net-mail/fdm/fdm-2.2-r3.ebuild
index 404b0182e72b7..ee77b6292d2d0 100644
--- a/net-mail/fdm/fdm-2.2-r3.ebuild
+++ b/net-mail/fdm/fdm-2.2-r3.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -25,6 +25,11 @@ RDEPEND="
 	acct-user/fdm
 "
 
+QA_CONFIG_IMPL_DECL_SKIP=(
+	# missing on musl, fdm has fallback implememntation
+	b64_ntop
+)
+
 DOCS=( CHANGES README TODO MANUAL )
 
 PATCHES=(