diff --git a/decoder_modules/radio/src/radio_module.h b/decoder_modules/radio/src/radio_module.h
index d6bab955..15046eab 100644
--- a/decoder_modules/radio/src/radio_module.h
+++ b/decoder_modules/radio/src/radio_module.h
@@ -59,7 +59,7 @@ public:
         ifChainOutputChanged.handler = ifChainOutputChangeHandler;
         ifChain.init(vfo->output, &ifChainOutputChanged);
 
-        fmnr.block.init(NULL, 64);
+        fmnr.block.init(NULL, 32);
         squelch.block.init(NULL, MIN_SQUELCH);
 
         ifChain.add(&fmnr);