diff --git a/src/pathchk.c b/src/pathchk.c
index 9c65b126c..97f2fb9d6 100644
--- a/src/pathchk.c
+++ b/src/pathchk.c
@@ -95,8 +95,6 @@
 # define NAME_MAX_FOR(p) NAME_MAX
 #endif
 
-char *xstrdup ();
-
 static int validate_path PARAMS ((char *path, int portability));
 
 /* The name this program was run with. */