1 files changed, 4 insertions, 1 deletions
diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index f3642203d..b8c3f1049 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -1540,7 +1540,10 @@ void WasmBinaryBuilder::readDataSegments() {
     }
     curr.isPassive = flags & BinaryConsts::IsPassive;
     if (flags & BinaryConsts::HasMemIndex) {
-      curr.index = getU32LEB();
+      auto memIndex = getU32LEB();
+      if (memIndex != 0) {
+        throwError("nonzero memory index");
+      }
     }
     if (!curr.isPassive) {
       curr.offset = readExpression();