diff --git a/asm.js b/asm.js
index 39dc49d..cfb0912 100644
--- a/asm.js
+++ b/asm.js
@@ -750,12 +750,17 @@ export class Assembler {
               ?? this.lookup_param(func, action.symbol)
               ?? this.lookup_local(func, action.symbol)
               ?? this.lookup_global(action.symbol)
-              ?? this.lookup_def(action.symbol);
         if (value == null) {
-            console.error(
-                `ERROR: Unable to resolve symbol ${action.symbol}`);
+            const def_value = this.lookup_def(action.symbol);
+            if (def_value == null) {
+                console.error(
+                    `ERROR: Unable to resolve symbol ${action.symbol}`);
+                return;
+            }
+            func.body.push(...this.leb128(def_value));
+        } else {
+            func.body.push(value);
         }
-        func.body.push(value);
     }
 
     action_mem(action) {