diff --git a/media-libs/osl/osl-1.12.14.0-r1.ebuild b/media-libs/osl/osl-1.12.14.0-r1.ebuild
index c6a86ec36e2f2..50363e61e5085 100644
--- a/media-libs/osl/osl-1.12.14.0-r1.ebuild
+++ b/media-libs/osl/osl-1.12.14.0-r1.ebuild
@@ -87,6 +87,11 @@ src_prepare() {
 }
 
 src_configure() {
+	# -Werror=lto-type-mismatch
+	# https://bugs.gentoo.org/875836
+	# https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/issues/1810
+	filter-lto
+
 	# pick the highest we support
 	local mysimd=()
 	if use cpu_flags_x86_avx512f; then
diff --git a/media-libs/osl/osl-1.12.14.0.ebuild b/media-libs/osl/osl-1.12.14.0.ebuild
index f44e08f29bafe..5af6590d6486d 100644
--- a/media-libs/osl/osl-1.12.14.0.ebuild
+++ b/media-libs/osl/osl-1.12.14.0.ebuild
@@ -74,6 +74,11 @@ pkg_setup() {
 }
 
 src_configure() {
+	# -Werror=lto-type-mismatch
+	# https://bugs.gentoo.org/875836
+	# https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/issues/1810
+	filter-lto
+
 	local cpufeature
 	local mysimd=()
 	for cpufeature in "${CPU_FEATURES[@]}"; do
diff --git a/media-libs/osl/osl-1.13.7.0.ebuild b/media-libs/osl/osl-1.13.7.0.ebuild
index 45ff2f64c225a..b43492c6caca3 100644
--- a/media-libs/osl/osl-1.13.7.0.ebuild
+++ b/media-libs/osl/osl-1.13.7.0.ebuild
@@ -94,6 +94,11 @@ src_prepare() {
 }
 
 src_configure() {
+	# -Werror=lto-type-mismatch
+	# https://bugs.gentoo.org/875836
+	# https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/issues/1810
+	filter-lto
+
 	# pick the highest we support
 	local mysimd=()
 	if use cpu_flags_x86_avx512f; then
diff --git a/media-libs/osl/osl-9999.ebuild b/media-libs/osl/osl-9999.ebuild
index 02e2f6079c81e..68654d760dc8d 100644
--- a/media-libs/osl/osl-9999.ebuild
+++ b/media-libs/osl/osl-9999.ebuild
@@ -94,6 +94,11 @@ src_prepare() {
 }
 
 src_configure() {
+	# -Werror=lto-type-mismatch
+	# https://bugs.gentoo.org/875836
+	# https://github.com/AcademySoftwareFoundation/OpenShadingLanguage/issues/1810
+	filter-lto
+
 	# pick the highest we support
 	local mysimd=()
 	if use cpu_flags_x86_avx512f; then