diff --git a/Makefile b/Makefile
index 2838a25..a5d9093 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,8 @@
+CFLAGS=-Wall -Wextra
 all:db.cc convert_db.h convert.cc
-	g++ -Wall -Wextra convert.cc db.cc -llmdb -ldb -lgdbm -lgdbm_compat -o db_converter
+	g++ $(CFLAGS) convert.cc db.cc -llmdb -ldb -lgdbm -lgdbm_compat -o db_converter
 static:db.cc convert_db.h convert.cc
-	g++ -Wall -Wextra convert.cc db.cc -llmdb -Wl,-Bstatic $(LDFLAGS) -ldb-5.3 -Wl,-Bdynamic -lgdbm -lgdbm_compat -o db_converter
+	g++ $(CFLAGS) convert.cc db.cc -llmdb -Wl,-Bstatic $(LDFLAGS) -ldb-5.3 -Wl,-Bdynamic -lgdbm -lgdbm_compat -o db_converter
 
 clean:
-	rm -rf convert
+	rm -rf db_converter