diff --git a/common/src/main/java/dev/cel/common/values/ProtoLiteCelValueConverter.java b/common/src/main/java/dev/cel/common/values/ProtoLiteCelValueConverter.java
index 481392466..e170c47cd 100644
--- a/common/src/main/java/dev/cel/common/values/ProtoLiteCelValueConverter.java
+++ b/common/src/main/java/dev/cel/common/values/ProtoLiteCelValueConverter.java
@@ -356,6 +356,8 @@ private Map.Entry<Object, Object> readSingleMapEntry(
       @Nullable FieldLiteDescriptor keyDescriptor,
       @Nullable FieldLiteDescriptor valueDescriptor) {
     CodedInputStream inputStream = bytes.newCodedInput();
+    // Lets submessages be zero-copy views of bytes; safe since ByteStrings are immutable.
+    inputStream.enableAliasing(true);
     int targetFieldNumber = fieldDescriptor.getFieldNumber();
     Object fieldValue = null;
     try {