diff --git a/Modules/PhotoacousticsLib/CMakeLists.txt b/Modules/PhotoacousticsLib/CMakeLists.txt
index 0ae41f8f5c..0c9bc7c276 100644
--- a/Modules/PhotoacousticsLib/CMakeLists.txt
+++ b/Modules/PhotoacousticsLib/CMakeLists.txt
@@ -1,15 +1,16 @@
 MITK_CREATE_MODULE(
   INCLUDE_DIRS PUBLIC include
   INTERNAL_INCLUDE_DIRS ${INCLUDE_DIRS_INTERNAL}
   DEPENDS PUBLIC MitkAlgorithmsExt tinyxml
   PACKAGE_DEPENDS
     tinyxml
     PUBLIC ITK
 )
 
 add_subdirectory(MitkMCxyz)
 
 add_subdirectory(MitkTissueBatchGenerator)
 add_subdirectory(MitkPAPhantomGenerator)
+add_subdirectory(MitkSpectralUnmixing)
 
 add_subdirectory(test)