diff --git a/src/backend/mod.rs b/src/backend/mod.rs
index 59331d55..300159ce 100644
--- a/src/backend/mod.rs
+++ b/src/backend/mod.rs
@@ -2814,9 +2814,10 @@ impl<'ctx> CoreStreamData<'ctx> {
                 return Err(Error::error());
             }
             cubeb_log!(
-                "({:p}) Input hardware description: {:?}",
+                "({:p}) Input hardware description: {:?}, device_channel_count={}",
                 self.stm_ptr,
-                input_hw_desc
+                input_hw_desc,
+                device_channel_count
             );
             assert!(input_hw_desc.mChannelsPerFrame >= device_channel_count);
             // Notice: when we are using aggregate device, the input_hw_desc.mChannelsPerFrame is