diff --git a/dev-libs/libsass/libsass-3.6.5-r1.ebuild b/dev-libs/libsass/libsass-3.6.5-r1.ebuild
index ff1a874152bee..220614e3439aa 100644
--- a/dev-libs/libsass/libsass-3.6.5-r1.ebuild
+++ b/dev-libs/libsass/libsass-3.6.5-r1.ebuild
@@ -1,9 +1,9 @@
-# Copyright 1999-2023 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
-inherit autotools
+inherit autotools flag-o-matic
 
 if [[ ${PV} = *9999 ]]; then
 	EGIT_REPO_URI="https://github.com/sass/libsass.git"
@@ -35,6 +35,10 @@ src_configure() {
 		--enable-shared
 	)
 
+	# https://bugs.gentoo.org/948969
+	# https://github.com/sass/libsass/issues/3193
+	filter-flags -fno-semantic-interposition
+
 	econf "${myeconfargs[@]}"
 }
 
diff --git a/dev-libs/libsass/libsass-3.6.6.ebuild b/dev-libs/libsass/libsass-3.6.6.ebuild
index c295ae9d00bce..220614e3439aa 100644
--- a/dev-libs/libsass/libsass-3.6.6.ebuild
+++ b/dev-libs/libsass/libsass-3.6.6.ebuild
@@ -1,9 +1,9 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
-inherit autotools
+inherit autotools flag-o-matic
 
 if [[ ${PV} = *9999 ]]; then
 	EGIT_REPO_URI="https://github.com/sass/libsass.git"
@@ -35,6 +35,10 @@ src_configure() {
 		--enable-shared
 	)
 
+	# https://bugs.gentoo.org/948969
+	# https://github.com/sass/libsass/issues/3193
+	filter-flags -fno-semantic-interposition
+
 	econf "${myeconfargs[@]}"
 }
 
diff --git a/dev-libs/libsass/libsass-9999.ebuild b/dev-libs/libsass/libsass-9999.ebuild
index f872ffcbf5445..21069e67d297d 100644
--- a/dev-libs/libsass/libsass-9999.ebuild
+++ b/dev-libs/libsass/libsass-9999.ebuild
@@ -1,9 +1,9 @@
-# Copyright 1999-2023 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
 
-inherit autotools
+inherit autotools flag-o-matic
 
 if [[ ${PV} = *9999 ]]; then
 	EGIT_REPO_URI="https://github.com/sass/libsass.git"
@@ -35,6 +35,10 @@ src_configure() {
 		--enable-shared
 	)
 
+	# https://bugs.gentoo.org/948969
+	# https://github.com/sass/libsass/issues/3193
+	filter-flags -fno-semantic-interposition
+
 	econf "${myeconfargs[@]}"
 }