diff --git a/dev-R/backports/backports-1.4.1.ebuild b/dev-R/backports/backports-1.4.1.ebuild
index 2378a4c6e0..315a9bd9ef 100644
--- a/dev-R/backports/backports-1.4.1.ebuild
+++ b/dev-R/backports/backports-1.4.1.ebuild
@@ -7,4 +7,4 @@ inherit R-packages
 
 DESCRIPTION='Reimplementations of Functions Introduced Since R-3.0.0'
 KEYWORDS="~amd64"
-LICENSE='GPL2 GPL3'
+LICENSE='GPL-2 GPL-3'