diff --git a/src/graph/validation.cc b/src/graph/validation.cc
index adfacafda1d7f784520c2f3eadfaccfc397a42e9..6365bc3fb36970bbedb36fd494f635bfd8d451a0 100644
--- a/src/graph/validation.cc
+++ b/src/graph/validation.cc
@@ -14,8 +14,6 @@
 // received a copy of the GNU Lesser General Public License along with
 // hpp-manipulation. If not, see <http://www.gnu.org/licenses/>.
 
-#define HPP_DEBUG 1
-
 #include "hpp/manipulation/graph/validation.hh"
 
 #include <sstream>