diff -up caps-0.9.24/AutoFilter.cc~ caps-0.9.24/AutoFilter.cc
--- caps-0.9.24/AutoFilter.cc~	2016-02-20 17:22:07.000000000 +0100
+++ caps-0.9.24/AutoFilter.cc	2016-02-20 17:22:30.081209456 +0100
@@ -69,7 +69,7 @@ AutoFilter::activate()
 void
 AutoFilter::cycle (uint frames)
 {
-	div_t qr = div (frames, blocksize);
+	div_t qr = div ((int)frames, (int)blocksize);
 	int blocks = qr.quot;
 	if (qr.rem) ++blocks;
 	double over_blocks = 1./blocks;