diff --git a/Source/Assistant/SkuAssist.cs b/Source/Assistant/SkuAssist.cs
index 9beb0ce..28d1503 100644
--- a/Source/Assistant/SkuAssist.cs
+++ b/Source/Assistant/SkuAssist.cs
@@ -104,7 +104,7 @@ namespace RehauSku.Assistant
         }
         public static bool IsRehauSku(this string line)
         {
-            return Regex.IsMatch(line, @"[1]\d{6}[1]\d{3}");
+            return Regex.IsMatch(line, @"^[1]\d{6}[1]\d{3}$");
         }
     }
 }
\ No newline at end of file