diff --git a/CMakeLists.txt b/CMakeLists.txt
index b0dabec3f10811d1979ec5342e3c1e799c082115..2b75bde9feb0c8e4ca57348b10cc980043be2f92 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -235,6 +235,7 @@ SET(HDRS_FACTOR
   include/core/factor/factor_autodiff_distance_3D.h
   include/core/factor/factor_base.h
   include/core/factor/factor_block_absolute.h
+  include/core/factor/factor_block_difference.h
   include/core/factor/factor_diff_drive.h
   include/core/factor/factor_odom_2D.h
   include/core/factor/factor_odom_2D_closeloop.h