diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 76f049e29aa2..88fed477e2b0 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -733,7 +733,8 @@ bool io_cqe_cache_refill(struct io_ring_ctx *ctx, bool overflow, bool cqe32)
 	 * Post dummy CQE if a 32b CQE is needed and there's only room for a
 	 * 16b CQE before the ring wraps.
 	 */
-	if (cqe32 && off + 1 == ctx->cq_entries) {
+	if (cqe32 && (ctx->flags & IORING_SETUP_CQE_MIXED) &&
+	    off + 1 == ctx->cq_entries) {
 		if (!io_fill_nop_cqe(ctx, off))
 			return false;
 		off = 0;