diff --git a/SConstruct b/SConstruct
index 2a6bfe1..7502a19 100644
--- a/SConstruct
+++ b/SConstruct
@@ -14,7 +14,7 @@ env = Environment(CPPPATH='#/include', LIBPATH=['/usr/lib','/usr/local/lib'])
 
 # Import GZip builder
 import gzipBuilder
-env['BUILDERS']['GZip']=Builder(action=gzipBuilder.GZip)
+env.Append(BUILDERS = {'GZip' : Builder(action=gzipBuilder.GZip)})
 
 #import environment
 from importer import importEnvironment,importVariable