diff --git a/src/main.lua b/src/main.lua
index 72e4353..957bc8c 100644
--- a/src/main.lua
+++ b/src/main.lua
@@ -671,6 +671,7 @@ local function VP_splitstack(_stack, x)
         buf[i] = v
         ind = ind + 1
     end
+    if #buf > 0 then table.insert(stacks, buf) end
 
     local out = {
         height=height,