diff --git a/src/filter/CMakeLists.txt b/src/filter/CMakeLists.txt
index b05744ee..b654120a 100644
--- a/src/filter/CMakeLists.txt
+++ b/src/filter/CMakeLists.txt
@@ -68,6 +68,7 @@ add_subdirectory (normaliz0r)
 add_subdirectory (nosync0r)
 add_subdirectory (perspective)
 add_subdirectory (pixeliz0r)
+add_subdirectory (pixs0r)
 add_subdirectory (posterize)
 add_subdirectory (premultiply)
 add_subdirectory (primaries)