diff --git a/lib/libc/xdr/xdr_array.c b/lib/libc/xdr/xdr_array.c
index f081c8644872..591c8b816f75 100644
--- a/lib/libc/xdr/xdr_array.c
+++ b/lib/libc/xdr/xdr_array.c
@@ -41,7 +41,7 @@ static char *sccsid = "@(#)xdr_array.c	2.1 88/07/29 4.0 RPCSRC";
 __FBSDID("$FreeBSD$");
 
 /*
- * xdr_array.c, Generic XDR routines impelmentation.
+ * xdr_array.c, Generic XDR routines implementation.
  *
  * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  * arrays.  See xdr.h for more info on the interface to xdr.
diff --git a/lib/libc/xdr/xdr_reference.c b/lib/libc/xdr/xdr_reference.c
index 76fc115dd30c..d18670f28ea6 100644
--- a/lib/libc/xdr/xdr_reference.c
+++ b/lib/libc/xdr/xdr_reference.c
@@ -41,7 +41,7 @@ static char *sccsid = "@(#)xdr_reference.c	2.1 88/07/29 4.0 RPCSRC";
 __FBSDID("$FreeBSD$");
 
 /*
- * xdr_reference.c, Generic XDR routines impelmentation.
+ * xdr_reference.c, Generic XDR routines implementation.
  *
  * These are the "non-trivial" xdr primitives used to serialize and de-serialize
  * "pointers".  See xdr.h for more info on the interface to xdr.
diff --git a/sys/xdr/xdr_array.c b/sys/xdr/xdr_array.c
index 31fe93434eb3..fd035b5bb40c 100644
--- a/sys/xdr/xdr_array.c
+++ b/sys/xdr/xdr_array.c
@@ -37,7 +37,7 @@ static char *sccsid = "@(#)xdr_array.c	2.1 88/07/29 4.0 RPCSRC";
 __FBSDID("$FreeBSD$");
 
 /*
- * xdr_array.c, Generic XDR routines impelmentation.
+ * xdr_array.c, Generic XDR routines implementation.
  *
  * Copyright (C) 1984, Sun Microsystems, Inc.
  *
diff --git a/sys/xdr/xdr_reference.c b/sys/xdr/xdr_reference.c
index 16ff8482d4cc..f559af512a2d 100644
--- a/sys/xdr/xdr_reference.c
+++ b/sys/xdr/xdr_reference.c
@@ -37,7 +37,7 @@ static char *sccsid = "@(#)xdr_reference.c	2.1 88/07/29 4.0 RPCSRC";
 __FBSDID("$FreeBSD$");
 
 /*
- * xdr_reference.c, Generic XDR routines impelmentation.
+ * xdr_reference.c, Generic XDR routines implementation.
  *
  * Copyright (C) 1987, Sun Microsystems, Inc.
  *