diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index d6781e00..b695c8d9 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -57,6 +57,7 @@ set(
   app/emu/audio/apu.cc
   app/emu/audio/spc700.cc
   app/emu/audio/dsp.cc
+  app/emu/audio/internal/addressing.cc
   app/emu/cpu/instructions.cc
   app/emu/cpu/addressing.cc
   app/emu/video/ppu.cc
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 7f139ee5..d3707a84 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -25,6 +25,7 @@ add_executable(
   ../src/app/emu/cpu.cc
   ../src/app/emu/cpu/instructions.cc
   ../src/app/emu/cpu/addressing.cc
+  ../src/app/emu/audio/internal/addressing.cc
   ../src/app/emu/audio/apu.cc
   ../src/app/emu/video/ppu.cc
   ../src/app/emu/audio/dsp.cc