diff --git a/libs/backends/dummy/dummy_audiobackend.cc b/libs/backends/dummy/dummy_audiobackend.cc
index f610e52d31..2c6a65102a 100644
--- a/libs/backends/dummy/dummy_audiobackend.cc
+++ b/libs/backends/dummy/dummy_audiobackend.cc
@@ -1823,7 +1823,7 @@ DummyAudioPort::setup_generator (GeneratorType const g, float const samplerate,
 					break;
 			}
 			_ltc_spd = 1.0;
-			_ltc_rand = floor(c / 4) * .001f;
+			_ltc_rand = floor((float)c / 4) * .001f;
 			if (c < 4) {
 					name += " (locked)";
 			} else {