diff --git a/src/virglrenderer.c b/src/virglrenderer.c
index d5cc44b..286de7e 100644
--- a/src/virglrenderer.c
+++ b/src/virglrenderer.c
@@ -133,7 +133,7 @@ int virgl_renderer_transfer_write_iov(uint32_t handle,
    transfer_info.iovec_cnt = iovec_cnt;
    transfer_info.context0 = true;
 
-   return vrend_renderer_transfer_iov(&transfer_info, VREND_TRANSFER_WRITE);
+   return vrend_renderer_transfer_iov(&transfer_info, VIRGL_TRANSFER_TO_HOST);
 }
 
 int virgl_renderer_transfer_read_iov(uint32_t handle, uint32_t ctx_id,
@@ -156,7 +156,7 @@ int virgl_renderer_transfer_read_iov(uint32_t handle, uint32_t ctx_id,
    transfer_info.iovec_cnt = iovec_cnt;
    transfer_info.context0 = true;
 
-   return vrend_renderer_transfer_iov(&transfer_info, VREND_TRANSFER_READ);
+   return vrend_renderer_transfer_iov(&transfer_info, VIRGL_TRANSFER_FROM_HOST);
 }
 
 int virgl_renderer_resource_attach_iov(int res_handle, struct iovec *iov,
diff --git a/src/vrend_renderer.c b/src/vrend_renderer.c
index b0d89c8..b43e507 100644
--- a/src/vrend_renderer.c
+++ b/src/vrend_renderer.c
@@ -6864,10 +6864,15 @@ int vrend_renderer_transfer_iov(const struct vrend_transfer_info *info,
       ctx = NULL;
    }
 
-   if (transfer_mode == VREND_TRANSFER_WRITE)
+   switch (transfer_mode) {
+   case VIRGL_TRANSFER_TO_HOST:
       return vrend_renderer_transfer_write_iov(ctx, res, iov, num_iovs, info);
-   else
+   case VIRGL_TRANSFER_FROM_HOST:
       return vrend_renderer_transfer_send_iov(res, iov, num_iovs, info);
+
+   default:
+      assert(0);
+   }
 }
 
 int vrend_transfer_inline_write(struct vrend_context *ctx,
@@ -8810,7 +8815,7 @@ void vrend_renderer_get_rect(int res_handle, struct iovec *iov, unsigned int num
    transfer_info.iovec = iov;
    transfer_info.iovec_cnt = num_iovs;
    transfer_info.context0 = true;
-   vrend_renderer_transfer_iov(&transfer_info, VREND_TRANSFER_READ);
+   vrend_renderer_transfer_iov(&transfer_info, VIRGL_TRANSFER_FROM_HOST);
 }
 
 void vrend_renderer_resource_set_priv(uint32_t res_handle, void *priv)
diff --git a/src/vrend_renderer.h b/src/vrend_renderer.h
index 4e34391..7708bed 100644
--- a/src/vrend_renderer.h
+++ b/src/vrend_renderer.h
@@ -266,8 +266,6 @@ void vrend_set_framebuffer_state_no_attach(struct vrend_context *ctx,
                                            uint32_t layers, uint32_t samples);
 void vrend_texture_barrier(struct vrend_context *ctx,
                            unsigned flags);
-#define VREND_TRANSFER_WRITE 1
-#define VREND_TRANSFER_READ 2
 int vrend_renderer_transfer_iov(const struct vrend_transfer_info *info, int transfer_mode);
 
 void vrend_renderer_resource_copy_region(struct vrend_context *ctx,