diff --git a/mm/memblock.c b/mm/memblock.c
index 3024eb3..43840b3 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -504,7 +504,7 @@
 
 int memblock_is_region_reserved(u64 base, u64 size)
 {
-	return memblock_overlaps_region(&memblock.reserved, base, size);
+	return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
 }
 
 /*