diff --git a/docs/rh-log.txt b/docs/rh-log.txt
index 4fda7c1cc0..ebf9cb6256 100644
--- a/docs/rh-log.txt
+++ b/docs/rh-log.txt
@@ -1,4 +1,10 @@
-July 25, 2009
+July 31, 2009
+- Changed A_SpawnFly to do nothing if reactiontime is 0. Reactiontime was
+  originally a counter, so if it started at 0, A_SpawnFly would effectively 
+  never spawn anything. Fixes Dehacked patches that use A_SpawnSound to
+  play a sound without shooting boss cubes, since it also calls A_SpawnFly.
+
+July 25, 2009
 - Joystick devices now send key up events for any buttons that are held
   down when they are destroyed.
 - Changed the joystick enable-y menu items to be nonrepeatable so that you
diff --git a/src/g_doom/a_bossbrain.cpp b/src/g_doom/a_bossbrain.cpp
index 2833f891bb..a763e3cbfc 100644
--- a/src/g_doom/a_bossbrain.cpp
+++ b/src/g_doom/a_bossbrain.cpp
@@ -144,13 +144,12 @@ static void SpawnFly(AActor *self, const PClass *spawntype, FSoundID sound)
 	AActor *targ;
 	int r;
 		
-	// [GZ] Should be more fiable than a countdown...
-	if (self->reactiontime > level.maptime)
+	// [GZ] Should be more viable than a countdown...
+	if (self->reactiontime == 0 || self->reactiontime > level.maptime)
 		return; // still flying
 		
 	targ = self->target;
 
-
 	if (spawntype != NULL)
 	{
 		fog = Spawn (spawntype, targ->x, targ->y, targ->z, ALLOW_REPLACE);