diff --git a/cpp/render.hpp b/cpp/render.hpp
index 8114e5e..9c71db8 100644
--- a/cpp/render.hpp
+++ b/cpp/render.hpp
@@ -29,7 +29,7 @@ typedef rk_handle_t rk_batch_t;
 
 typedef rk_uint rk_texture_format;
 
-enum : rk_uint {
+enum : rk_texture_format {
     RK_TEXTURE_FORMAT_SRGB8_A8 = 0,
     RK_TEXTURE_FORMAT_RGBA8 = 1,
     RK_TEXTURE_FORMAT_RGB10_A2 = 2,
@@ -38,7 +38,7 @@ enum : rk_uint {
 
 typedef rk_uint rk_texture_flags;
 
-enum : rk_uint {
+enum : rk_texture_flags {
     RK_TEXTURE_FLAG_3D = RK_FLAG(0),
     RK_TEXTURE_FLAG_MIPMAPS = RK_FLAG(1),
     RK_TEXTURE_FLAG_MIN_NEAREST = 0,
@@ -62,7 +62,7 @@ enum : rk_vertex_format {
 
 typedef rk_ubyte rk_instance_flags;
 
-enum : rk_ubyte {
+enum : rk_instance_flags {
     RK_INSTANCE_FLAG_SPAWNED = RK_FLAG(0),
     RK_INSTANCE_FLAG_VISIBLE = RK_FLAG(1),
     RK_INSTANCE_FLAGS_SPAWNED_VISIBLE = RK_INSTANCE_FLAG_SPAWNED | RK_INSTANCE_FLAG_VISIBLE