diff --git a/app-backup/tsm/metadata.xml b/app-backup/tsm/metadata.xml
index 5c23451875cc2..249336c90817e 100644
--- a/app-backup/tsm/metadata.xml
+++ b/app-backup/tsm/metadata.xml
@@ -5,7 +5,7 @@
 		<email>dilfridge@gentoo.org</email>
 	</maintainer>
 	<use>
-		<flag name="tsm_cit">IBM Tivoli Common Inventory Technology</flag>
-		<flag name="tsm_hw">Difference snapshot support for NetApp and N-Series file servers</flag>
+		<flag name="tsm-cit">IBM Tivoli Common Inventory Technology</flag>
+		<flag name="tsm-hw">Difference snapshot support for NetApp and N-Series file servers</flag>
 	</use>
 </pkgmetadata>
diff --git a/app-backup/tsm/tsm-7.1.8.0-r1.ebuild b/app-backup/tsm/tsm-7.1.8.0-r1.ebuild
index df5a6de943ef1..58c58485a2bfd 100644
--- a/app-backup/tsm/tsm-7.1.8.0-r1.ebuild
+++ b/app-backup/tsm/tsm-7.1.8.0-r1.ebuild
@@ -35,7 +35,7 @@ LICENSE="Apache-1.1 Apache-2.0 JDOM BSD-2 CC-PD Boost-1.0 MIT CPL-1.0 HPND Exola
 
 SLOT="0"
 KEYWORDS="-* ~amd64"
-IUSE="acl java +tsm_cit +tsm_hw"
+IUSE="acl java +tsm-cit +tsm-hw"
 QA_PREBUILT="*"
 
 # not available (yet?)
@@ -86,10 +86,10 @@ src_unpack() {
 	for rpm in *.rpm; do
 		case ${rpm} in
 			TIVsm-APIcit.*|TIVsm-BAcit.*)
-				use tsm_cit && rpms="${rpms} ./${rpm}"
+				use tsm-cit && rpms="${rpms} ./${rpm}"
 				;;
 			TIVsm-BAhdw.*)
-				use tsm_hw && rpms="${rpms} ./${rpm}"
+				use tsm-hw && rpms="${rpms} ./${rpm}"
 				;;
 			TIVsm-JBB.*|*-filepath-*)
 				# "journal based backup" for all filesystems
diff --git a/app-backup/tsm/tsm-8.1.6.0.ebuild b/app-backup/tsm/tsm-8.1.6.0.ebuild
index f2c450a85ded4..6671f616235f2 100644
--- a/app-backup/tsm/tsm-8.1.6.0.ebuild
+++ b/app-backup/tsm/tsm-8.1.6.0.ebuild
@@ -35,7 +35,7 @@ LICENSE="Apache-1.1 Apache-2.0 JDOM BSD-2 CC-PD Boost-1.0 MIT CPL-1.0 HPND Exola
 
 SLOT="0"
 KEYWORDS="-* ~amd64"
-IUSE="acl java +tsm_cit +tsm_hw"
+IUSE="acl java +tsm-cit +tsm-hw"
 QA_PREBUILT="*"
 
 # not available (yet?)
@@ -86,10 +86,10 @@ src_unpack() {
 	for rpm in *.rpm; do
 		case ${rpm} in
 			TIVsm-APIcit.*|TIVsm-BAcit.*)
-				use tsm_cit && rpms="${rpms} ./${rpm}"
+				use tsm-cit && rpms="${rpms} ./${rpm}"
 				;;
 			TIVsm-BAhdw.*)
-				use tsm_hw && rpms="${rpms} ./${rpm}"
+				use tsm-hw && rpms="${rpms} ./${rpm}"
 				;;
 			TIVsm-JBB.*|*-filepath-*)
 				# "journal based backup" for all filesystems