diff --git a/Modules/PhotoacousticsLib/MitkSpectralUnmixing/CMakeLists.txt b/Modules/PhotoacousticsLib/MitkSpectralUnmixing/CMakeLists.txt
index f2faf72a92..4d5fa870a1 100644
--- a/Modules/PhotoacousticsLib/MitkSpectralUnmixing/CMakeLists.txt
+++ b/Modules/PhotoacousticsLib/MitkSpectralUnmixing/CMakeLists.txt
@@ -1,11 +1,11 @@
-OPTION(BUILD_PhotoacousticSpectralUnmixing "Build MiniApp for batch generating of photoacoustic spectral unmixing" OFF)
+OPTION(BUILD_PhotoacousticSpectralUnmixing "Build MiniApp for batch generating of photoacoustic spectral unmixing" ON)
 
 IF(BUILD_PhotoacousticSpectralUnmixing)
   PROJECT( MitkSpectralUnmxing )
     mitk_create_executable(SpectralUnmxingApp
       DEPENDS MitkCommandLine MitkCore MitkPhotoacousticsLib
       PACKAGE_DEPENDS
       CPP_FILES SpectralUnmixingApp.cpp)
 
   install(TARGETS ${EXECUTABLE_TARGET} RUNTIME DESTINATION bin)
  ENDIF()