diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index 4d3859e11f12..5628f85bc5b0 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1733,7 +1733,7 @@ void r4k_cache_init(void)
 	 * This code supports virtually indexed processors and will be
 	 * unnecessarily inefficient on physically indexed processors.
 	 */
-	if (c->dcache.linesz)
+	if (c->dcache.linesz && cpu_has_dc_aliases)
 		shm_align_mask = max_t( unsigned long,
 					c->dcache.sets * c->dcache.linesz - 1,
 					PAGE_SIZE - 1);