diff --git a/release-packaging/Classes/FluidBufCompose.sc b/release-packaging/Classes/FluidBufCompose.sc
index a86c0d8..c060466 100644
--- a/release-packaging/Classes/FluidBufCompose.sc
+++ b/release-packaging/Classes/FluidBufCompose.sc
@@ -23,8 +23,8 @@ FluidBufCompose : FluidBufProcessor {
 	    ^this.new( server, nil, [destination]).processList([source, startFrame, numFrames, startChan, numChans, gain, destination, destStartFrame, destStartChan, destGain, 1], freeWhenDone, action);//NB always blocking
 	}
 
-   *processBlocking { |server, source, startFrame = 0, numFrames = -1, startChan = 0, numChans = -1, gain = 1, destination, destStartFrame = 0, destStartChan = 0, destGain = 0, freeWhenDone, action|
-              
+   *processBlocking { |server, source, startFrame = 0, numFrames = -1, startChan = 0, numChans = -1, gain = 1, destination, destStartFrame = 0, destStartChan = 0, destGain = 0, freeWhenDone = true, action|
+
        source = source.asUGenInput;
        destination = destination.asUGenInput;