1 files changed, 1 insertions, 1 deletions
diff --git a/src/wasm-ast.h b/src/wasm-ast.h
index a8d1b644..3939ec92 100644
--- a/src/wasm-ast.h
+++ b/src/wasm-ast.h
@@ -34,7 +34,7 @@ typedef struct WasmVar {
   WasmLocation loc;
   WasmVarType type;
   union {
-    int index;
+    int64_t index;
     WasmStringSlice name;
   };
 } WasmVar;