diff --git a/crates/gen-c/src/lib.rs b/crates/gen-c/src/lib.rs
index 21acaaf6b..6e2ca0c1e 100644
--- a/crates/gen-c/src/lib.rs
+++ b/crates/gen-c/src/lib.rs
@@ -1652,7 +1652,7 @@ impl Bindgen for FunctionBindgen<'_> {
                     list_name, elem_name, operands[0], operands[1]
                 ));
             }
-            Instruction::IterElem => results.push("e".to_string()),
+            Instruction::IterElem { .. } => results.push("e".to_string()),
             Instruction::IterBasePointer => results.push("base".to_string()),
 
             Instruction::BufferLowerPtrLen { .. } => {
diff --git a/crates/gen-js/src/lib.rs b/crates/gen-js/src/lib.rs
index bf9644676..27f720245 100644
--- a/crates/gen-js/src/lib.rs
+++ b/crates/gen-js/src/lib.rs
@@ -1665,7 +1665,7 @@ impl Bindgen for FunctionBindgen<'_> {
                 }
             }
 
-            Instruction::IterElem => results.push("e".to_string()),
+            Instruction::IterElem { .. } => results.push("e".to_string()),
 
             Instruction::IterBasePointer => results.push("base".to_string()),
 
diff --git a/crates/gen-rust-wasm/src/lib.rs b/crates/gen-rust-wasm/src/lib.rs
index f8fede1e2..dd7c3ec53 100644
--- a/crates/gen-rust-wasm/src/lib.rs
+++ b/crates/gen-rust-wasm/src/lib.rs
@@ -1157,7 +1157,7 @@ impl Bindgen for FunctionBindgen<'_> {
                 ));
             }
 
-            Instruction::IterElem => results.push("e".to_string()),
+            Instruction::IterElem { .. } => results.push("e".to_string()),
 
             Instruction::IterBasePointer => results.push("base".to_string()),
 
diff --git a/crates/gen-wasmtime-py/src/lib.rs b/crates/gen-wasmtime-py/src/lib.rs
index 16a67a8f1..3e0b10189 100644
--- a/crates/gen-wasmtime-py/src/lib.rs
+++ b/crates/gen-wasmtime-py/src/lib.rs
@@ -1965,7 +1965,7 @@ impl Bindgen for FunctionBindgen<'_> {
                 results.push(result);
             }
 
-            Instruction::IterElem => {
+            Instruction::IterElem { .. } => {
                 let name = self.locals.tmp("e");
                 results.push(name.clone());
                 self.payloads.push(name);
diff --git a/crates/gen-wasmtime/src/lib.rs b/crates/gen-wasmtime/src/lib.rs
index 7fc8fb4bc..34f03b65e 100644
--- a/crates/gen-wasmtime/src/lib.rs
+++ b/crates/gen-wasmtime/src/lib.rs
@@ -1968,7 +1968,7 @@ impl Bindgen for FunctionBindgen<'_> {
                 }
             }
 
-            Instruction::IterElem => results.push("e".to_string()),
+            Instruction::IterElem { .. } => results.push("e".to_string()),
 
             Instruction::IterBasePointer => results.push("base".to_string()),
 
diff --git a/crates/witx2/src/abi.rs b/crates/witx2/src/abi.rs
index 084adfde7..01ded327e 100644
--- a/crates/witx2/src/abi.rs
+++ b/crates/witx2/src/abi.rs
@@ -479,7 +479,7 @@ def_instruction! {
         /// each iteration of the list.
         ///
         /// This is only used inside of blocks related to lowering lists.
-        IterElem : [0] => [1],
+        IterElem { element: &'a Type } : [0] => [1],
 
         /// Pushes an operand onto the stack representing the base pointer of
         /// the next element in a list.
@@ -1485,7 +1485,7 @@ impl<'a, B: Bindgen> Generator<'a, B> {
                             self.emit(&ListCanonLower { element, realloc });
                         } else {
                             self.push_block();
-                            self.emit(&IterElem);
+                            self.emit(&IterElem { element });
                             self.emit(&IterBasePointer);
                             let addr = self.stack.pop().unwrap();
                             self.write_to_memory(element, addr, 0);