diff --git a/dev-lang/fsharp/fsharp-3.1.1.31.ebuild b/dev-lang/fsharp/fsharp-3.1.1.31.ebuild
index abf2ccac2458b..40ce3dfad5eda 100644
--- a/dev-lang/fsharp/fsharp-3.1.1.31.ebuild
+++ b/dev-lang/fsharp/fsharp-3.1.1.31.ebuild
@@ -18,7 +18,7 @@ KEYWORDS="~x86 ~amd64"
 IUSE=""
 
 MAKEOPTS+=" -j1" #nowarn
-DEPEND="dev-lang/mono"
+DEPEND=">=dev-lang/mono-3"
 RDEPEND="${DEPEND}"
 
 AUTOTOOLS_IN_SOURCE_BUILD=1