diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 028c42b5..f342d462 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,13 +1,14 @@
 sc_usb_audio Change Log
 =======================
 
-6.12.7
+6.13.0
 ------
     - ADDED:      Device now uses implicit feedback when input stream is available (previously explicit
                   feedback pipe always used). This saves chanend/EP resources and means less processing 
                   burden for the host. Previous behaviour available by enabling UAC_FORCE_FEEDBACK_EP
+    - RESOLVED:   Exception when SPDIF_TX and ADAT_TX both enabled due to clock-block being configured
+                  after already started. Caused by SPDIF_TX define check typo
     - CHANGE:     Mixer and non-mixer channel comms scheme (decouple <-> audio path) now the identical
-    
 
 6.12.6
 ------
diff --git a/module_usb_audio/audio.xc b/module_usb_audio/audio.xc
index 30e705ee..1b1839ea 100755
--- a/module_usb_audio/audio.xc
+++ b/module_usb_audio/audio.xc
@@ -994,7 +994,7 @@ chanend ?c_config, chanend ?c
     configure_clock_src(clk_mst_spd, p_mclk_in);
     configure_out_port_no_ready(p_adat_tx, clk_mst_spd, 0);
     set_clock_fall_delay(clk_mst_spd, 7);
-#ifndef SPDIF
+#ifndef SPDIF_TX
     start_clock(clk_mst_spd);
 #endif
 #endif