diff --git a/src/host/genminilua.lua b/src/host/genminilua.lua
index e9a68297..16a81a23 100644
--- a/src/host/genminilua.lua
+++ b/src/host/genminilua.lua
@@ -157,11 +157,11 @@ local function merge_includes(src)
     if includes[name] then return "" end
     includes[name] = true
     local fp = assert(io.open(LUA_SOURCE..name, "r"))
-    local src = fp:read("*a")
+    local inc = fp:read("*a")
     assert(fp:close())
-    src = gsub(src, "#ifndef%s+%w+_h\n#define%s+%w+_h\n", "")
-    src = gsub(src, "#endif%s*$", "")
-    return merge_includes(src)
+    inc = gsub(inc, "#ifndef%s+%w+_h\n#define%s+%w+_h\n", "")
+    inc = gsub(inc, "#endif%s*$", "")
+    return merge_includes(inc)
   end)
 end