diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 1271c3e73f2..ab0016d0277 100644
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -4736,7 +4736,7 @@ static void write_event(struct radv_cmd_buffer *cmd_buffer,
 
 	radv_cs_add_buffer(cmd_buffer->device->ws, cs, event->bo);
 
-	MAYBE_UNUSED unsigned cdw_max = radeon_check_space(cmd_buffer->device->ws, cs, 18);
+	MAYBE_UNUSED unsigned cdw_max = radeon_check_space(cmd_buffer->device->ws, cs, 21);
 
 	/* Flags that only require a top-of-pipe event. */
 	VkPipelineStageFlags top_of_pipe_flags =