diff --git a/sndlock.cpp b/sndlock.cpp
index 2e30c3e..d8b69f4 100644
--- a/sndlock.cpp
+++ b/sndlock.cpp
@@ -86,7 +86,7 @@ static void dsp_thread()
     int32_t buf_in[SND_BUFLEN*SND_RCHAN];
     size_t buf_in_offset = sizeof(buf_in);
 
-    FIFO<phase_t, 16> ftw_fifo[SND_PCHAN];
+    FIFO<phase_t, 32> ftw_fifo[SND_PCHAN];
 
     int clipped_count = 0;
     double peak_running = 0.0;