diff --git a/ChangeLog b/ChangeLog
index c4ff0392..83f03682 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-01-06  Nicolas François  <nicolas.francois@centraliens.net>
+
+	* src/suauth.c: Remove prototype of check_su_auth(). It is
+	redundant with prototypes.h.
+	* src/suauth.c: isgrp() is static.
+
 2008-01-06  Nicolas François  <nicolas.francois@centraliens.net>
 
 	* libmisc/obscure.c: Tag the `old' parameter of palindrome(),
diff --git a/src/suauth.c b/src/suauth.c
index 21f2a4e9..a9cab331 100644
--- a/src/suauth.c
+++ b/src/suauth.c
@@ -28,8 +28,7 @@ struct passwd pwent;
  */
 static int applies (const char *, char *);
 
-int check_su_auth (const char *, const char *);
-int isgrp (const char *, const char *);
+static int isgrp (const char *, const char *);
 
 static int lines = 0;
 
@@ -197,7 +196,7 @@ static int applies (const char *single, char *list)
 	return 0;
 }
 
-int isgrp (const char *name, const char *group)
+static int isgrp (const char *name, const char *group)
 {
 	struct group *grp;