diff --git a/stringer.go b/stringer.go
index 1527b7d..d672639 100644
--- a/stringer.go
+++ b/stringer.go
@@ -110,7 +110,9 @@ func main() {
 	// Print the header and package clause.
 	g.Printf("// Code generated by \"enumer %s\"; DO NOT EDIT.\n", strings.Join(os.Args[1:], " "))
 	g.Printf("\n")
-	g.Printf("// %s\n", comments.String())
+	if comments.String() != "" {
+		g.Printf("// %s\n", comments.String())
+	}
 	g.Printf("package %s", g.pkg.name)
 	g.Printf("\n")
 	g.Printf("import (\n")