diff --git a/lib/xcode/configuration.rb b/lib/xcode/configuration.rb
index 036256e..3a70dcf 100644
--- a/lib/xcode/configuration.rb
+++ b/lib/xcode/configuration.rb
@@ -442,6 +442,8 @@ def substitute(value)
           case match
             when "$(TARGET_NAME)"
               @target.name 
+            when "$(SRCROOT)"
+              
             else
               raise "Unknown substitution variable #{match}"
           end