diff --git a/op25/gr-op25_repeater/lib/p25_frame_assembler_impl.cc b/op25/gr-op25_repeater/lib/p25_frame_assembler_impl.cc
index 1c1acf7..dba0aa9 100644
--- a/op25/gr-op25_repeater/lib/p25_frame_assembler_impl.cc
+++ b/op25/gr-op25_repeater/lib/p25_frame_assembler_impl.cc
@@ -113,6 +113,7 @@ p25_frame_assembler_impl::forecast(int nof_output_items, gr_vector_int &nof_inpu
    nof_samples_reqd = nof_output_items;
    if (d_do_audio_output)
      nof_samples_reqd = 0.6 * nof_output_items;
+   nof_samples_reqd = std::max(nof_samples_reqd, 256);
    std::fill(&nof_input_items_reqd[0], &nof_input_items_reqd[nof_inputs], nof_samples_reqd);
 }