diff --git a/src/build.py b/src/build.py
index 65f94c279..d519c8d72 100644
--- a/src/build.py
+++ b/src/build.py
@@ -70,10 +70,10 @@ if env['THREADING'] == 'multi':
     lib_env['LIBS'].append('boost_thread%s' % env['BOOST_APPEND'])
         
     
-
-if not env['RUNTIME_LINK'] == 'static':
+if env['RUNTIME_LINK'] == 'static':
     if 'icuuc' in env['ICU_LIB_NAME']:
         lib_env['LIBS'].append('icudata')
+else:
     if env['INTERNAL_LIBAGG']:
           lib_env['LIBS'].insert(0, 'agg')
     else: