diff --git a/instruction.go b/instruction.go
index 7bd9d5e..96b1501 100644
--- a/instruction.go
+++ b/instruction.go
@@ -34,6 +34,9 @@ func (instruction *LinkInstruction) String() string {
 
 func ParseInstruction(line, workdir string) (LinkInstruction, error) {
 	line = strings.TrimSpace(line)
+	if strings.HasPrefix(line, "#") {
+		return LinkInstruction{}, fmt.Errorf("comment line")
+	}
 	parts := strings.Split(line, deliminer)
 	instruction := LinkInstruction{}