diff --git a/lib/libprocstat/libprocstat.3 b/lib/libprocstat/libprocstat.3
index 10045bcdd548..35c9016bc9ca 100644
--- a/lib/libprocstat/libprocstat.3
+++ b/lib/libprocstat/libprocstat.3
@@ -157,7 +157,6 @@
 .Fa "struct procstat *procstat"
 .Fa "const struct kinfo_proc *kp"
 .Fa "size_t nchr"
-.Fa "char *errbuf"
 .Fc
 .Ft "Elf_Auxinfo *"
 .Fo procstat_getauxv
@@ -170,7 +169,6 @@
 .Fa "struct procstat *procstat"
 .Fa "const struct kinfo_proc *kp"
 .Fa "size_t nchr"
-.Fa "char *errbuf"
 .Fc
 .Ft "struct filestat_list *"
 .Fo procstat_getfiles