diff --git a/src/audio_core/hle/wmf_decoder.cpp b/src/audio_core/hle/wmf_decoder.cpp
index 5dd28b7b5..1a6e147ee 100644
--- a/src/audio_core/hle/wmf_decoder.cpp
+++ b/src/audio_core/hle/wmf_decoder.cpp
@@ -185,6 +185,8 @@ std::optional<BinaryResponse> WMFDecoder::Impl::Decode(const BinaryRequest& requ
         return response;
     }
 
+    response.num_channels = adts_header.channels;
+
     if (!selected) {
         LOG_DEBUG(Audio_DSP, "New ADTS stream: channels = {}, sample rate = {}",
                   adts_header.channels, adts_header.samplerate);
@@ -240,7 +242,6 @@ std::optional<BinaryResponse> WMFDecoder::Impl::Decode(const BinaryRequest& requ
                     out_streams[1].data(), out_streams[1].size());
     }
 
-    response.num_channels = adts_header.channels;
     return response;
 }
 
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index b6af20886..c6b222ef0 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -9,6 +9,7 @@ add_executable(tests
     core/hle/kernel/hle_ipc.cpp
     core/memory/memory.cpp
     core/memory/vm_manager.cpp
+    audio_core/audio_fixures.h
     audio_core/decoder_tests.cpp
     tests.cpp
 )