diff --git a/usr.bin/compress/zopen.3 b/usr.bin/compress/zopen.3
index 8e78fcdf1645..a1ffbf75d20d 100644
--- a/usr.bin/compress/zopen.3
+++ b/usr.bin/compress/zopen.3
@@ -39,7 +39,7 @@
 .Nm zopen
 .Nd compressed stream open function
 .Sh SYNOPSIS
-.Fd #include "zopen.h"
+.Fd #include \&"zopen.h\&"
 .Ft FILE *
 .Fn zopen "const char *path" "const char *mode" "int bits"
 .Sh DESCRIPTION