diff --git a/lib/string_calculator.dart b/lib/string_calculator.dart
index 67fa9bd..bb7e714 100644
--- a/lib/string_calculator.dart
+++ b/lib/string_calculator.dart
@@ -12,7 +12,7 @@ class StringCalculator {
   int add(String numbers) {
     // Bug 1: Empty string handling
     if (numbers.isEmpty) {
-      return 1; // Should return 0
+      return 0; // Fixed: Return 0 for empty string
     }
 
     // Bug 2: Single number parsing