diff --git a/eclass/toolchain.eclass b/eclass/toolchain.eclass
index dbdd9b24c01b2..efa78f6136709 100644
--- a/eclass/toolchain.eclass
+++ b/eclass/toolchain.eclass
@@ -1199,6 +1199,8 @@ toolchain_setup_d() {
 toolchain_src_configure() {
 	BUILD_CONFIG_TARGETS=()
 	is-flagq '-O3' && BUILD_CONFIG_TARGETS+=( bootstrap-O3 )
+	is-flagq '-fsanitize=address' && BUILD_CONFIG_TARGETS+=( bootstrap-asan )
+	is-flagq '-fsanitize=undefined' && BUILD_CONFIG_TARGETS+=( bootstrap-ubsan )
 
 	downgrade_arch_flags
 	gcc_do_filter_flags