diff --git a/nms.lua b/nms.lua
index ab12f63..2f5db30 100644
--- a/nms.lua
+++ b/nms.lua
@@ -39,13 +39,13 @@ local function nms(boxes, overlap)
     I = I[{{1,last-1}}]
     
     xx1:index(x1,1,I)
-    xx1:clamp(0,x1[i])
+    xx1:cmax(x1[i])
     yy1:index(y1,1,I)
-    yy1:clamp(0,y1[i])
+    yy1:cmax(y1[i])
     xx2:index(x2,1,I)
-    xx2:clamp(x2[i],math.huge)
+    xx2:cmin(x2[i])
     yy2:index(y2,1,I)
-    yy2:clamp(y2[i],math.huge)
+    yy2:cmin(y2[i])
     
     w:resizeAs(xx2):zero()
     w:map2(xx2,xx1,function(xx,xxx2,xxx1) return math.max(xxx2-xxx1+1,0) end)