diff --git a/lib/krb5/init_creds_pw.c b/lib/krb5/init_creds_pw.c
index 89f0e853c..ca1e4531b 100644
--- a/lib/krb5/init_creds_pw.c
+++ b/lib/krb5/init_creds_pw.c
@@ -66,7 +66,7 @@ default_s2k_func(krb5_context context, krb5_enctype type,
     krb5_data password;
     krb5_data opaque;
 
-    password.data = (void *)keyseed;
+    password.data = rk_UNCONST(keyseed);
     password.length = strlen(keyseed);
     if (s2kparms)
 	opaque = *s2kparms;