diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c
index 1b4001e0285fe0a5979558e2e9e2ce8f60e0808e..b16344479959b6f7e042b7f1ed46a769a1262cb5 100644
--- a/drivers/s390/crypto/pkey_api.c
+++ b/drivers/s390/crypto/pkey_api.c
@@ -45,7 +45,8 @@ static debug_info_t *debug_info;
 
 static void __init pkey_debug_init(void)
 {
-	debug_info = debug_register("pkey", 1, 1, 4 * sizeof(long));
+	/* 5 arguments per dbf entry (including the format string ptr) */
+	debug_info = debug_register("pkey", 1, 1, 5 * sizeof(long));
 	debug_register_view(debug_info, &debug_sprintf_view);
 	debug_set_level(debug_info, 3);
 }