diff --git a/makefile b/makefile
index a8799e2..2959836 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,6 @@
 CC ?= gcc
 CFLAGS = -Wall -pedantic --std=c99 -O2
+DBG_CFLAGS = -Wall -Werror -pedantic --std=c99 -O0 -g
 LDFLAGS = -lpam -lpam_misc
 PREFIX = /usr/local
 MANPREFIX = ${PREFIX}/share/man
@@ -7,7 +8,7 @@ MANPREFIX = ${PREFIX}/share/man
 us: us.c
 
 dbg:
-	gcc -O0 -g us.c -o us
+	gcc ${LDFLAGS} ${DBG_CFLAGS} us.c -o us
 
 install: us
 	mkdir -p ${DESTDIR}${PREFIX}/bin