diff --git a/sci-visualization/labplot/labplot-2.9.0-r1.ebuild b/sci-visualization/labplot/labplot-2.9.0-r1.ebuild
index 1e23e3c19800..c45f80b7f620 100644
--- a/sci-visualization/labplot/labplot-2.9.0-r1.ebuild
+++ b/sci-visualization/labplot/labplot-2.9.0-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2023 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -54,7 +54,7 @@ DEPEND="
 	fits? ( sci-libs/cfitsio:= )
 	hdf5? ( sci-libs/hdf5:= )
 	libcerf? ( sci-libs/libcerf )
-	markdown? ( app-text/discount )
+	markdown? ( app-text/discount:= )
 	matio? ( sci-libs/matio:= )
 	netcdf? ( sci-libs/netcdf:= )
 	origin? ( sci-libs/liborigin:2 )
diff --git a/sci-visualization/labplot/labplot-9999.ebuild b/sci-visualization/labplot/labplot-9999.ebuild
index 1e23e3c19800..c45f80b7f620 100644
--- a/sci-visualization/labplot/labplot-9999.ebuild
+++ b/sci-visualization/labplot/labplot-9999.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2022 Gentoo Authors
+# Copyright 1999-2023 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -54,7 +54,7 @@ DEPEND="
 	fits? ( sci-libs/cfitsio:= )
 	hdf5? ( sci-libs/hdf5:= )
 	libcerf? ( sci-libs/libcerf )
-	markdown? ( app-text/discount )
+	markdown? ( app-text/discount:= )
 	matio? ( sci-libs/matio:= )
 	netcdf? ( sci-libs/netcdf:= )
 	origin? ( sci-libs/liborigin:2 )