diff --git a/man2/mincore.2 b/man2/mincore.2
index b816e10c6..38ee7d6fa 100644
--- a/man2/mincore.2
+++ b/man2/mincore.2
@@ -36,7 +36,6 @@
 mincore \- determine whether pages are resident in memory
 .SH SYNOPSIS
 .nf
-.B #include <unistd.h>
 .B #include <sys/mman.h>
 .PP
 .BI "int mincore(void *" addr ", size_t " length ", unsigned char *" vec );