diff --git a/src/drivers/intel/fsp2_0/util.c b/src/drivers/intel/fsp2_0/util.c
index 1dedb6587f..7fa2af4722 100644
--- a/src/drivers/intel/fsp2_0/util.c
+++ b/src/drivers/intel/fsp2_0/util.c
@@ -183,7 +183,7 @@ void fsp_verify_upd_header_signature(uint64_t upd_signature, uint64_t expected_s
 		/* The UPD signatures are non-zero-terminated ASCII stored as a little endian
 		   uint64_t, so this needs some casts. */
 		die_with_post_code(POST_INVALID_VENDOR_BINARY,
-			"Invalid UPD signature! FSP provided \"%8s\", expected was \"%8s\".\n",
+			"Invalid UPD signature! FSP provided \"%.8s\", expected was \"%.8s\".\n",
 			(char *)&upd_signature,
 			(char *)&expected_signature);
 	}