diff --git a/drivers/misc/mods/mods_mem.c b/drivers/misc/mods/mods_mem.c
index 2441b2de..f00aac88 100644
--- a/drivers/misc/mods/mods_mem.c
+++ b/drivers/misc/mods/mods_mem.c
@@ -2258,7 +2258,7 @@ static void clear_contiguous_cache(struct mods_client *client,
 	}
 #endif
 
-	d_size = 4 << d_line_shift;
+	d_size = (u64)4 << d_line_shift;
 	cur = virt_start & ~(d_size - 1);
 	do {
 		asm volatile("dc civac, %0" : : "r" (cur) : "memory");