diff --git a/Makefile b/Makefile
index 67d37cf..329341e 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ endif
 
 
 ifneq ($(DEBUG),)
-CXXFLAGS += -ggdb -O0
+CXXFLAGS += -ggdb -O0 -DDEBUG
 else
 CXXFLAGS += -O2
 endif
diff --git a/utils/Makefile b/utils/Makefile
index 3d1de32..b9fd76f 100644
--- a/utils/Makefile
+++ b/utils/Makefile
@@ -23,7 +23,7 @@ LDFLAGS += -lgourou
 endif
 
 ifneq ($(DEBUG),)
-CXXFLAGS += -ggdb -O0
+CXXFLAGS += -ggdb -O0 -DDEBUG
 else
 CXXFLAGS += -O2
 endif