diff --git a/videodev-simulation.cc b/videodev-simulation.cc
index 1f088ba..f42ef2f 100644
--- a/videodev-simulation.cc
+++ b/videodev-simulation.cc
@@ -193,7 +193,7 @@ Simulation::Simulation() {
 
 	//
 	// object movement
-	dAngle = 2.0 * M_PI * (double)random() / (double) RAND_MAX;
+	dAngle = 360.0 * (double)random() / (double) RAND_MAX;
 	dLen = 1.0 + 5.0 * (double)random() / (double) RAND_MAX;
 
 	printf ("%s:%d %s dAngle:%f    dLen:%f\n", __FILE__, __LINE__, __FUNCTION__, dAngle, dLen);