diff --git a/cmd/compose/top.go b/cmd/compose/top.go
index abc16d05e..f5ef97a5c 100644
--- a/cmd/compose/top.go
+++ b/cmd/compose/top.go
@@ -96,16 +96,16 @@ func collectTop(containers []api.ContainerProcSummary) (topHeader, []topEntries)
 
 	// ensure CMD is the right-most column
 	if pos, ok := header["CMD"]; ok {
-		max := pos
+		maxPos := pos
 		for h, i := range header {
-			if i > max {
-				max = i
+			if i > maxPos {
+				maxPos = i
 			}
 			if i > pos {
 				header[h] = i - 1
 			}
 		}
-		header["CMD"] = max
+		header["CMD"] = maxPos
 	}
 
 	return header, entries