diff --git a/share/man/man4/de.4 b/share/man/man4/de.4
index 431ef797190..11fd647959b 100644
--- a/share/man/man4/de.4
+++ b/share/man/man4/de.4
@@ -119,7 +119,7 @@ Certain revisions of the chipset are not supported by this driver.
 .El
 .Sh CAVEATS
 Since the 21040 is available on both EISA and PCI boards, one must be careful
-in how defines the 21040 in the kernel config file.
+in how one defines the 21040 in the kernel config file.
 .Sh SEE ALSO
 .Xr arp 4 ,
 .Xr netintro 4 ,