diff --git a/src/dxvk/dxvk_image.h b/src/dxvk/dxvk_image.h
index f55ae42d..df06930e 100644
--- a/src/dxvk/dxvk_image.h
+++ b/src/dxvk/dxvk_image.h
@@ -190,11 +190,7 @@ namespace dxvk {
      * \returns Size of that level
      */
     VkExtent3D mipLevelExtent(uint32_t level) const {
-      VkExtent3D size = m_info.extent;
-      size.width  = std::max(1u, size.width  >> level);
-      size.height = std::max(1u, size.height >> level);
-      size.depth  = std::max(1u, size.depth  >> level);
-      return size;
+      return util::computeMipLevelExtent(m_info.extent, level);
     }
     
     /**
diff --git a/src/dxvk/dxvk_util.h b/src/dxvk/dxvk_util.h
index cde2e8a9..86bb44e9 100644
--- a/src/dxvk/dxvk_util.h
+++ b/src/dxvk/dxvk_util.h
@@ -87,6 +87,20 @@ namespace dxvk::util {
         && ((extent.depth  % blockSize.depth  == 0) || (uint32_t(offset.z + extent.depth)  == imageSize.depth));
   }
   
+  /**
+   * \brief Computes mip level extent
+   *
+   * \param [in] size Base mip level extent
+   * \param [in] level mip level to compute
+   * \returns Extent of the given mip level
+   */
+  inline VkExtent3D computeMipLevelExtent(VkExtent3D size, uint32_t level) {
+    size.width  = std::max(1u, size.width  >> level);
+    size.height = std::max(1u, size.height >> level);
+    size.depth  = std::max(1u, size.depth  >> level);
+    return size;
+  }
+  
   /**
    * \brief Computes block offset for compressed images
    *