diff --git a/profiles/desc/transport.desc b/profiles/desc/transport.desc
new file mode 100644
index 0000000000..2189eb6fc2
--- /dev/null
+++ b/profiles/desc/transport.desc
@@ -0,0 +1,7 @@
+# Copyright 2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# This file contains descriptions of TRANSPORT USE_EXPAND flags.
+
+shmem - Use Shared memory for on-node communication. This is currently experimental and should be avoided
+udp - Use UDP for remote communication
diff --git a/sys-cluster/portals4/metadata.xml b/sys-cluster/portals4/metadata.xml
index a84c812602..6a7a0dbdea 100644
--- a/sys-cluster/portals4/metadata.xml
+++ b/sys-cluster/portals4/metadata.xml
@@ -15,8 +15,6 @@
 		<flag name="pmi">Enable PMI support</flag>
 		<flag name="ppe">Enable process-offload engine for Portals. Experimental</flag>
 		<flag name="reliable-udp">Use reliable UDP for remote communication</flag>
-		<flag name="transport-shmem">Use Shared memory for on-node communication. This is currently experimental and should be avoided</flag>
-		<flag name="transport-udp">Use UDP for remote communication</flag>
 		<flag name="zero-mrs">Enable this when using MOFED V2.2+ or Qlogic InfiniPath Hardware of IB communication</flag>
 		<flag name="unordered-matching">Enable unordered (hashed) match list searching. Experimental</flag>
 	</use>
diff --git a/sys-cluster/portals4/portals4-1.0_alpha1_p20190109-r3.ebuild b/sys-cluster/portals4/portals4-1.0_alpha1_p20190109-r3.ebuild
index ace51d1780..7f62a9b5dd 100644
--- a/sys-cluster/portals4/portals4-1.0_alpha1_p20190109-r3.ebuild
+++ b/sys-cluster/portals4/portals4-1.0_alpha1_p20190109-r3.ebuild
@@ -22,8 +22,8 @@ LICENSE="BSD"
 SLOT="0"
 KEYWORDS="~amd64"
 IUSE_TRANSPORT="
-	transport-shmem
-	+transport-udp
+	transport_shmem
+	+transport_udp
 "
 IUSE="${IUSE_TRANSPORT} knem me-triggered pmi ppe reliable-udp test unordered-matching zero-mrs"
 
@@ -43,10 +43,10 @@ DEPEND="
 PATCHES=( "${FILESDIR}/${PN}-fix-PPE-related-compile-and-link-errors.patch" )
 RESTRICT="!test? ( test )"
 REQUIRED_USE="
-	?? ( ppe transport-shmem )
+	?? ( ppe transport_shmem )
 
-	knem? ( transport-shmem )
-	reliable-udp? ( transport-udp )
+	knem? ( transport_shmem )
+	reliable-udp? ( transport_udp )
 "
 
 src_prepare() {
@@ -61,7 +61,7 @@ src_configure() {
 		--disable-picky
 		--disable-pmi-from-portals
 		--disable-static
-		--disable-transport-ib
+		--disable-transport_ib
 		--with-ev="${EPREFIX}/usr"
 		--without-ofed
 
@@ -69,8 +69,8 @@ src_configure() {
 		$(use_enable ppe)
 		$(use_enable reliable-udp)
 		$(use_enable test testing)
-		$(use_enable transport-shmem)
-		$(use_enable transport-udp)
+		$(use_enable transport_shmem)
+		$(use_enable transport_udp)
 		$(use_enable unordered-matching)
 		$(use_enable zero-mrs)
 	)