--- a/gr-blocks/lib/CMakeLists.txt
+++ b/gr-blocks/lib/CMakeLists.txt
@@ -236,7 +236,6 @@
     qa_gr_flowgraph.cc
     qa_gr_hier_block2.cc
     qa_gr_hier_block2_derived.cc
-    qa_gr_top_block.cc
     qa_rotator.cc
     qa_set_msg_handler.cc
   )