diff --git a/src/sna/kgem.c b/src/sna/kgem.c
index 3853379c..dbe64233 100644
--- a/src/sna/kgem.c
+++ b/src/sna/kgem.c
@@ -127,7 +127,7 @@ static struct drm_i915_gem_exec_object2 _kgem_dummy_exec;
 
 static inline int bytes(struct kgem_bo *bo)
 {
-	return kgem_bo_size(bo);
+	return __kgem_bo_size(bo);
 }
 
 #define bucket(B) (B)->size.pages.bucket
diff --git a/src/sna/kgem.h b/src/sna/kgem.h
index f1ded245..7b388fbb 100644
--- a/src/sna/kgem.h
+++ b/src/sna/kgem.h
@@ -423,7 +423,7 @@ static inline int __kgem_buffer_size(struct kgem_bo *bo)
 
 static inline int __kgem_bo_size(struct kgem_bo *bo)
 {
-	assert(!(bo->proxy && bo->io));
+	assert(bo->proxy == NULL);
 	return PAGE_SIZE * bo->size.pages.count;
 }