diff --git a/install-mpsd-software-environment.py b/install-mpsd-software-environment.py
index 5ba0008d31eaa086bb43f07c7d1564fc499735ea..046319b78a9e11b46137dfb9bbedd8827c552de4 100755
--- a/install-mpsd-software-environment.py
+++ b/install-mpsd-software-environment.py
@@ -300,7 +300,8 @@ def main():
             subp.add_argument("release", type=str, help="Release version to install or remove")
             if cmd in ["install", "reinstall"]:
                 subp.add_argument(
-                    "--toolchains",
+                    "--toolchain",
+                    "--toolchains"
                     type=str,
                     nargs="+",
                     default="NONE",