diff --git a/main.go b/main.go
index 9876d16..fe0eb08 100644
--- a/main.go
+++ b/main.go
@@ -31,7 +31,6 @@ var (
 	CommitSHA = ""
 
 	readmeNames      = []string{"README.md", "README", "Readme.md", "Readme", "readme.md", "readme"}
-	readmeBranches   = []string{"main", "master"}
 	configFile       string
 	pager            bool
 	style            string
@@ -75,8 +74,9 @@ func sourceFromArg(arg string) (*source, error) {
 
 	// a GitHub or GitLab URL (even without the protocol):
 	src, err := readmeURL(arg)
-	if src != nil || err != nil {
-		return src, err
+	if src != nil && err == nil {
+		// if there's an error, try next methods...
+		return src, nil
 	}
 
 	// HTTP(S) URLs: