diff --git a/lib/libbsnmp/modules/Makefile.inc b/lib/libbsnmp/modules/Makefile.inc
index e9203cd6f009..f4efa73e8657 100644
--- a/lib/libbsnmp/modules/Makefile.inc
+++ b/lib/libbsnmp/modules/Makefile.inc
@@ -22,4 +22,8 @@ FILESGROUPS+=	BMIBS
 .endif
 BMIBSDIR=	${SHAREDIR}/snmp/mibs
 
+MANFILTER=	sed -e 's%@MODPATH@%${LIBDIR}/%g'		\
+		    -e 's%@DEFPATH@%${DEFSDIR}/%g'		\
+		    -e 's%@MIBSPATH@%${BMIBSDIR}/%g'
+
 .include "../Makefile.inc"
diff --git a/usr.sbin/bsnmpd/bsnmpd/Makefile b/usr.sbin/bsnmpd/bsnmpd/Makefile
index 0f70d8f15158..465a8a8097bd 100644
--- a/usr.sbin/bsnmpd/bsnmpd/Makefile
+++ b/usr.sbin/bsnmpd/bsnmpd/Makefile
@@ -36,4 +36,8 @@ oid.h: tree.def
 tree.c tree.h: tree.def
 	gensnmptree -l < ${.ALLSRC}
 
+MANFILTER=	sed -e 's%@MODPATH@%${LIBDIR}/%g'		\
+		    -e 's%@DEFPATH@%${DEFSDIR}/%g'		\
+		    -e 's%@MIBSPATH@%${BMIBSDIR}/%g'
+
 .include <bsd.prog.mk>
diff --git a/usr.sbin/bsnmpd/modules/Makefile.inc b/usr.sbin/bsnmpd/modules/Makefile.inc
index e9203cd6f009..f4efa73e8657 100644
--- a/usr.sbin/bsnmpd/modules/Makefile.inc
+++ b/usr.sbin/bsnmpd/modules/Makefile.inc
@@ -22,4 +22,8 @@ FILESGROUPS+=	BMIBS
 .endif
 BMIBSDIR=	${SHAREDIR}/snmp/mibs
 
+MANFILTER=	sed -e 's%@MODPATH@%${LIBDIR}/%g'		\
+		    -e 's%@DEFPATH@%${DEFSDIR}/%g'		\
+		    -e 's%@MIBSPATH@%${BMIBSDIR}/%g'
+
 .include "../Makefile.inc"