diff --git a/libowlps/libowlps.c b/libowlps/libowlps.c
index 7cd0aeb..c14d6e4 100644
--- a/libowlps/libowlps.c
+++ b/libowlps/libowlps.c
@@ -336,7 +336,9 @@ void sigint_handler(int num)
 
   run = FALSE ;
 
+#ifdef DEBUG
   printf("\nSignal received: end.\n");
+#endif // DEBUG
   fflush(NULL) ;
 }