1 files changed, 5 insertions, 0 deletions

diff --git a/src/ext/Firewall/wixext/FirewallDecompiler.cs b/src/ext/Firewall/wixext/FirewallDecompiler.cs
index 46ab2bd1..4fafc0a0 100644
--- a/src/ext/Firewall/wixext/FirewallDecompiler.cs
+++ b/src/ext/Firewall/wixext/FirewallDecompiler.cs
@@ -506,6 +506,11 @@ namespace WixToolset.Firewall
     {
         public static string ToCamelCase(this string str)
         {
+            if (String.IsNullOrEmpty(str))
+            {
+                return str;
+            }
+
             var camelCase = str[0].ToString().ToLowerInvariant() + str.Substring(1);
 
             return camelCase;