diff --git a/Dockerfile b/Dockerfile
index c160db11..e6c2a0a0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -61,7 +61,7 @@ RUN git clone https://github.com/miweber67/spyserver_client.git /root/spyserver_
 # Compile ka9q-radio from source
 RUN git clone https://github.com/ka9q/ka9q-radio.git /root/ka9q-radio && \
   cd /root/ka9q-radio && \
-  git checkout 770f988955a0dfb380b71d4cf58529cc6f824e67 && \
+  git checkout 541c15849cbe59694770ca1b2bbad1835ad3667f && \
   make \
     -f Makefile.linux \
     "COPTS=-std=gnu11 -pthread -Wall -funsafe-math-optimizations -fno-math-errno -fcx-limited-range -D_GNU_SOURCE=1" \
diff --git a/auto_rx/autorx/ka9q.py b/auto_rx/autorx/ka9q.py
index 4c4aa466..bef7e1b4 100644
--- a/auto_rx/autorx/ka9q.py
+++ b/auto_rx/autorx/ka9q.py
@@ -141,6 +141,7 @@ def ka9q_get_iq_cmd(
     _cmd = (
         f"pcmcat "
         f"-s {round(frequency / 1000)}{ssrc} "
+        f"-b 1 "
         f"{_pcm_host} |"
     )