diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7b723c7f9910e5c1166a5be2c5437cf3c64ee4a..77e1399e0c932accf62a532fc0e91fd573b30c6e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -102,6 +102,7 @@ endif()
 
 include(RelaxSE_Sources)
 if(ENABLE_DEV)
+  add_definitions(-DVAR_DEV)
   include(RelaxSE_dev)
 endif()
 
diff --git a/src/prop.F90 b/src/prop.F90
index fa2ad9ea392328686cab1e6e59578e6094c7757e..ae44767795d487ae91cada4c8a20a885623f098f 100644
--- a/src/prop.F90
+++ b/src/prop.F90
@@ -43,7 +43,9 @@ Program proprietes
   use gener_monos
   use utils_char
   use utils_wrt
+#ifdef VAR_DEV
   use densite
+#endif
   
 !!$ -------- Donnes locales -----------------------------------
   implicit none