diff --git a/crates/compiler/types/src/types.rs b/crates/compiler/types/src/types.rs
index 6c196ce27a..21b7b3c7ca 100644
--- a/crates/compiler/types/src/types.rs
+++ b/crates/compiler/types/src/types.rs
@@ -4607,18 +4607,9 @@ pub fn gather_tags_unsorted_iter(
 
     let mut stack = vec![other_fields];
 
-    #[cfg(debug_assertions)]
-    let mut seen_head_union = false;
-
     loop {
         match subs.get_content_without_compacting(ext.var()) {
             Structure(TagUnion(sub_fields, sub_ext)) => {
-                #[cfg(debug_assertions)]
-                {
-                    assert!(!seen_head_union, "extension variable is another tag union, but I expected it to be either open or closed!");
-                    seen_head_union = true;
-                }
-
                 stack.push(*sub_fields);
 
                 ext = *sub_ext;