diff --git a/src/pointer.nim b/src/pointer.nim
index 219fa12..ae11ce8 100644
--- a/src/pointer.nim
+++ b/src/pointer.nim
@@ -201,7 +201,7 @@ proc Eval(p: var Pointer, f: var Field, c: int): (bool, ref int) =
       let n = p.ss[].Pop()
       let now = now()
       let (x, y, lx, ly) = f.GetSize()
-      let (height, heights) = p.ss[].GetHeights()
+      let heights = p.ss[].GetHeights()
       # 20
       for key, value in envPairs():
         case key
@@ -229,10 +229,10 @@ proc Eval(p: var Pointer, f: var Field, c: int): (bool, ref int) =
         for j in countdown(p.argv[i].len-1, 0):
           p.ss[].Push(int(p.argv[i][j]))
       # 18
-      for i in 0..<height:
+      for i in 0..<heights.len:
         p.ss[].Push(heights[i])
       # 17
-      p.ss[].Push(height)
+      p.ss[].Push(heights.len)
       # 16
       p.ss[].Push(now.hour * 256 * 256 + now.minute * 256 + now.second)
       # 15
diff --git a/src/stackStack.nim b/src/stackStack.nim
index b2bf29f..4445b1a 100644
--- a/src/stackStack.nim
+++ b/src/stackStack.nim
@@ -74,8 +74,8 @@ func Under*(ss: var StackStack): bool =
       soss[].Push(ss.Pop())
   return false
 
-func GetHeights*(ss: StackStack): (int, seq[int]) =
-  return (ss.height, ss.head[].GetHeights)
+func GetHeights*(ss: StackStack): seq[int] =
+  return ss.head[].GetHeights
 
 func YCommandPick*(ss: var StackStack, n, h: int) =
   ss.head[].YCommandPick(n, h)
diff --git a/tests/stackStack.nim b/tests/stackStack.nim
index 8ff3e62..e00a624 100644
--- a/tests/stackStack.nim
+++ b/tests/stackStack.nim
@@ -148,4 +148,4 @@ suite "StackStack":
     check empty[].Pop() == 6
   test "GetHeights":
     var empty = NewStackStack()
-    check empty[].GetHeights == (1, @[0])
+    check empty[].GetHeights == @[0]