diff --git a/lib/libsmdb/Makefile b/lib/libsmdb/Makefile
index 5dff6b572d1d..9af91b4e8986 100644
--- a/lib/libsmdb/Makefile
+++ b/lib/libsmdb/Makefile
@@ -1,28 +1,28 @@
 # $FreeBSD$
 
 PACKAGE=lib${LIB}
 SENDMAIL_DIR=${SRCTOP}/contrib/sendmail
 .PATH:	${SENDMAIL_DIR}/libsmdb
 
 CFLAGS+=-I${SENDMAIL_DIR}/src -I${SENDMAIL_DIR}/include -I.
 CFLAGS+=-DNEWDB -DNOT_SENDMAIL
 
 # User customizations to the sendmail build environment
 CFLAGS+=${SENDMAIL_CFLAGS}
 
 WARNS?=	3
 
 LIB=	smdb
 
 SRCS+=	sm_os.h
 SRCS+=	smdb.c smdb1.c smdb2.c smndbm.c smcdb.c
 CLEANFILES+=sm_os.h
 
 INTERNALLIB=
 
 sm_os.h: ${SENDMAIL_DIR}/include/sm/os/sm_os_freebsd.h .NOMETA
 	ln -sf ${.ALLSRC} ${.TARGET}
 
 .include <bsd.lib.mk>
 
-CWARNFLAGS+= ${NO_WDEPRECATED_NON_PROTOTYPE}
+CWARNFLAGS+= ${NO_WDEPRECATED_NON_PROTOTYPE} ${NO_WSTRICT_PROTOTYPES}