diff --git a/src/test/cpp/regression/makefile b/src/test/cpp/regression/makefile
index 1ffc036..d82a3e4 100644
--- a/src/test/cpp/regression/makefile
+++ b/src/test/cpp/regression/makefile
@@ -43,7 +43,7 @@ ADDCFLAGS += -CFLAGS -pthread
 ADDCFLAGS += -CFLAGS -DTHREAD_COUNT=${THREAD_COUNT}
 
 ifeq ($(DEBUG),yes)
-	ADDCFLAGS += -CFLAGS -Og -CFLAGS -g
+	ADDCFLAGS += -CFLAGS -O0 -CFLAGS -g
 else
 	ADDCFLAGS += -CFLAGS -O3  -O3
 endif