diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index 581c82f065403d781fbc91502d4db8b50a620419..99ca8f37e411521c62c024411ced0214692811ef 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -55,7 +55,7 @@ SET (CGoGN_EXT_LIBS
 #optionnal libs
 IF (WITH_ASSIMP)
 	add_definitions(-DWITH_ASSIMP)	
-	SET (CGoGN_EXT_INCLUDES ${CGoGN_EXT_INCLUDES} ThirdParty/Assimp/include)
+	SET (CGoGN_EXT_INCLUDES ${CGoGN_EXT_INCLUDES} ${CGoGN_ROOT_DIR}/ThirdParty/Assimp/include)	
 	SET (CGoGN_EXT_LIBS ${CGoGN_EXT_LIBS} assimp)
 ENDIF (WITH_ASSIMP)
 
diff --git a/include/Utils/img3D_IO.h b/include/Utils/img3D_IO.h
index a68bbac81b9d7f1e03dce5f03f2b94664f26802a..45cf536d1e46054bb69c9c9ee9389a7aafaf551f 100644
--- a/include/Utils/img3D_IO.h
+++ b/include/Utils/img3D_IO.h
@@ -26,7 +26,6 @@
 #define __IMG3D_IO__
 
 #include "Utils/os_spec.h"
-#include <IL/ilu.h>
 
 namespace CGoGN
 {
diff --git a/include/Utils/pointSprite.h b/include/Utils/pointSprite.h
index 150eb653348bdf023a92912403d70e98e5f4ad16..df19e4d2ae4cd2c033920671b1ab2c62f79e0606 100644
--- a/include/Utils/pointSprite.h
+++ b/include/Utils/pointSprite.h
@@ -27,8 +27,6 @@
 
 #include "Utils/GLSLShader.h"
 #include "Geometry/vector_gen.h"
-#include <IL/ilu.h>
-#include <IL/ilut.h>
 
 namespace CGoGN { namespace Utils { class VBO; } }
 
diff --git a/include/Utils/text3d.h b/include/Utils/text3d.h
index 68267f097a390e8a53a0c52cb1f18ef1f8bdf47f..bd76625b931dfd19a81d362bb70ad3dc5e7526cf 100644
--- a/include/Utils/text3d.h
+++ b/include/Utils/text3d.h
@@ -27,8 +27,7 @@
 
 #include "Utils/GLSLShader.h"
 #include "Geometry/vector_gen.h"
-#include <IL/ilu.h>
-#include <IL/ilut.h>
+
 
 namespace CGoGN
 {