diff --git a/pkg/cmd/auth/login/login.go b/pkg/cmd/auth/login/login.go
index 699cdcf77..84894bf10 100644
--- a/pkg/cmd/auth/login/login.go
+++ b/pkg/cmd/auth/login/login.go
@@ -151,6 +151,11 @@ func loginRun(opts *LoginOptions) error {
 		}
 	}
 
+	// The go-gh Config object currently does not support case-insensitive lookups for host names,
+	// so normalize the host name case here before performing any lookups with it or persisting it.
+	// https://github.com/cli/go-gh/pull/105
+	hostname = strings.ToLower(hostname)
+
 	if src, writeable := shared.AuthTokenWriteable(authCfg, hostname); !writeable {
 		fmt.Fprintf(opts.IO.ErrOut, "The value of the %s environment variable is being used for authentication.\n", src)
 		fmt.Fprint(opts.IO.ErrOut, "To have GitHub CLI store credentials instead, first clear the value from the environment.\n")