diff --git a/include/android/surface_control.h b/include/android/surface_control.h
index 1237aa6..443cb7e 100644
--- a/include/android/surface_control.h
+++ b/include/android/surface_control.h
@@ -303,7 +303,7 @@
 /**
  * Parameter for ASurfaceTransaction_setVisibility().
  */
-enum {
+enum ASurfaceTransactionVisibility : int8_t {
     ASURFACE_TRANSACTION_VISIBILITY_HIDE = 0,
     ASURFACE_TRANSACTION_VISIBILITY_SHOW = 1,
 };
@@ -315,7 +315,8 @@
  * Available since API level 29.
  */
 void ASurfaceTransaction_setVisibility(ASurfaceTransaction* transaction,
-                                       ASurfaceControl* surface_control, int8_t visibility)
+                                       ASurfaceControl* surface_control,
+                                       enum ASurfaceTransactionVisibility visibility)
                                        __INTRODUCED_IN(29);
 
 /**
@@ -436,7 +437,7 @@
 /**
  * Parameter for ASurfaceTransaction_setBufferTransparency().
  */
-enum {
+enum ASurfaceTransactionTransparency : int8_t {
     ASURFACE_TRANSACTION_TRANSPARENCY_TRANSPARENT = 0,
     ASURFACE_TRANSACTION_TRANSPARENCY_TRANSLUCENT = 1,
     ASURFACE_TRANSACTION_TRANSPARENCY_OPAQUE = 2,
@@ -450,7 +451,7 @@
  */
 void ASurfaceTransaction_setBufferTransparency(ASurfaceTransaction* transaction,
                                                ASurfaceControl* surface_control,
-                                               int8_t transparency)
+                                               enum ASurfaceTransactionTransparency transparency)
                                                __INTRODUCED_IN(29);
 
 /**