diff --git a/libs/vkd3d-common/debug.c b/libs/vkd3d-common/debug.c
index aa7df5bd..e12cd394 100644
--- a/libs/vkd3d-common/debug.c
+++ b/libs/vkd3d-common/debug.c
@@ -126,10 +126,10 @@ void vkd3d_dbg_set_log_callback(PFN_vkd3d_log callback)
 static char *get_buffer(void)
 {
     static char buffers[VKD3D_DEBUG_BUFFER_COUNT][VKD3D_DEBUG_BUFFER_SIZE];
-    static LONG buffer_index;
-    LONG current_index;
+    static unsigned int buffer_index;
+    unsigned int current_index;
 
-    current_index = InterlockedIncrement(&buffer_index) % ARRAY_SIZE(buffers);
+    current_index = vkd3d_atomic_increment_u32(&buffer_index) % ARRAY_SIZE(buffers);
     return buffers[current_index];
 }