diff --git a/src/spectrum/wscript b/src/spectrum/wscript
index 085a415b3..1070a5b87 100644
--- a/src/spectrum/wscript
+++ b/src/spectrum/wscript
@@ -2,7 +2,7 @@
 
 def build(bld):
 
-    module = bld.create_ns3_module('spectrum', ['propagation', 'antenna'])
+    module = bld.create_ns3_module('spectrum', ['propagation', 'antenna', 'buildings'])
     module.source = [
         'model/spectrum-model.cc',
         'model/spectrum-value.cc',