diff --git a/dev-libs/libdispatch/libdispatch-5.3.3-r1.ebuild b/dev-libs/libdispatch/libdispatch-5.3.3-r1.ebuild
index 11c5f15b7a783..e1834b4c8b3b2 100644
--- a/dev-libs/libdispatch/libdispatch-5.3.3-r1.ebuild
+++ b/dev-libs/libdispatch/libdispatch-5.3.3-r1.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=7
 
-inherit cmake
+inherit flag-o-matic cmake toolchain-funcs
 
 MY_PN="swift-corelibs-${PN}"
 MY_PV="swift-${PV}-RELEASE"