diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -51,6 +51,9 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20251006: Remove libnss_tacplus.a (it never should have been installed)
+OLD_FILES+=usr/lib/libnss_tacplus.a
+
 # 20251003: kgdb python scripts moved
 OLD_FILES+=usr/libexec/kgdb/acttrace.py
 OLD_DIRS+=usr/libexec/kgdb
diff --git a/lib/nss_tacplus/Makefile b/lib/nss_tacplus/Makefile
--- a/lib/nss_tacplus/Makefile
+++ b/lib/nss_tacplus/Makefile
@@ -3,7 +3,7 @@
 SHLIB_MAJOR=	1
 SHLIB_NAME=	${LIB}.so.${SHLIB_MAJOR}
 LIBADD=		tacplus
-MK_INSTALLIB=	no
+MK_INSTALLLIB=	no
 MAN=		${LIB}.8
 
 .include <bsd.lib.mk>