diff --git a/libavfilter/vulkan_filter.c b/libavfilter/vulkan_filter.c
index d3dc2fdacb..cef42eeb4d 100644
--- a/libavfilter/vulkan_filter.c
+++ b/libavfilter/vulkan_filter.c
@@ -187,6 +187,7 @@ int ff_vk_filter_config_input(AVFilterLink *inlink)
     s->input_frames_ref = inlink->hw_frames_ctx;
 
     /* Defaults */
+    s->input_format = input_frames->sw_format;
     s->output_format = input_frames->sw_format;
     s->output_width = inlink->w;
     s->output_height = inlink->h;