diff --git a/libs/binder/include/binder/Stability.h b/libs/binder/include/binder/Stability.h
index 77f0667..487f480 100644
--- a/libs/binder/include/binder/Stability.h
+++ b/libs/binder/include/binder/Stability.h
@@ -45,7 +45,7 @@
     // up the efficiency level of a binder object. So, we expose the underlying type.
     friend ::android::Parcel;
 
-    enum Level : int32_t {
+    enum Level : int16_t {
         UNDECLARED = 0,
 
         VENDOR = 0b000011,