diff --git a/arch/nds32/mm/mmap.c b/arch/nds32/mm/mmap.c
index c206b31ce07ac4e239b05a0c8e00cc309666f88e..1bdf5e7d1b4384fe7401ef43ac3b69832ff69f3b 100644
--- a/arch/nds32/mm/mmap.c
+++ b/arch/nds32/mm/mmap.c
@@ -59,7 +59,7 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
 
 		vma = find_vma(mm, addr);
 		if (TASK_SIZE - len >= addr &&
-		    (!vma || addr + len <= vma->vm_start))
+		    (!vma || addr + len <= vm_start_gap(vma)))
 			return addr;
 	}