diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index d6eaa6cf06..7aa23ca15d 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -3723,11 +3723,7 @@ arc_init(void)
 
 	/* set min cache to 1/32 of all memory, or 64MB, whichever is more */
 	arc_c_min = MAX(arc_c / 4, 64<<20);
-	/* set max to 1/2 of all memory, or all but 4GB, whichever is more */
-	if (arc_c * 8 >= ((uint64_t)4<<30))
-		arc_c_max = (arc_c * 8) - ((uint64_t)4<<30);
-	else
-		arc_c_max = arc_c_min;
+	/* set max to 1/2 of all memory */
 	arc_c_max = MAX(arc_c * 4, arc_c_max);
 
 	/*