diff --git a/ggml-vulkan.cpp b/ggml-vulkan.cpp
index 89c29346e..087b46f2d 100644
--- a/ggml-vulkan.cpp
+++ b/ggml-vulkan.cpp
@@ -808,7 +808,7 @@ static uint32_t find_properties(const vk::PhysicalDeviceMemoryProperties* mem_pr
 
 static vk_buffer ggml_vk_create_buffer(ggml_backend_vk_context * ctx, size_t size, vk::MemoryPropertyFlags req_flags, vk::MemoryPropertyFlags fallback_flags = vk::MemoryPropertyFlags(0)) {
 #ifdef GGML_VULKAN_DEBUG
-    std::cerr << "ggml_vk_create_buffer(" << size << ", " << to_string(req_flags) << ", " << to_string(fallback_flags) << ")" << std::endl;
+    std::cerr << "ggml_vk_create_buffer(device " << ctx->idx << ", " << size << ", " << to_string(req_flags) << ", " << to_string(fallback_flags) << ")" << std::endl;
 #endif
     vk_buffer buf = std::make_shared<vk_buffer_struct>();