diff --git a/Modules/DiffusionImaging/Connectomics/CMakeLists.txt b/Modules/DiffusionImaging/Connectomics/CMakeLists.txt
index 863ec094de..3437c9d9f1 100644
--- a/Modules/DiffusionImaging/Connectomics/CMakeLists.txt
+++ b/Modules/DiffusionImaging/Connectomics/CMakeLists.txt
@@ -1,15 +1,16 @@
 # Boost throws a lot of unused variable warnings on linux
 
 if(UNIX)
   mitkFunctionCheckCAndCXXCompilerFlags("-Wno-error=unused-variable" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
+  mitkFunctionCheckCAndCXXCompilerFlags("-Wno-error=unneeded-internal-declaration" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
 endif()
 
 MITK_CREATE_MODULE( Connectomics
   SUBPROJECTS MITK-DTI
   INCLUDE_DIRS Algorithms IODataStructures Rendering ${CMAKE_CURRENT_BINARY_DIR}
   DEPENDS DiffusionCore FiberTracking
   PACKAGE_DEPENDS VTK|vtkInfovisLayout
   WARNINGS_AS_ERRORS
 )
 
 add_subdirectory(Testing)