diff --git a/CMakeLists.txt b/CMakeLists.txt
index 105b576de..946f210d8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -435,6 +435,8 @@ src/engine/platform/sound/ymz280b.cpp
 
 src/engine/platform/sound/vsu.cpp
 
+src/engine/platform/sound/t6w28/T6W28_Apu.cpp
+
 src/engine/platform/sound/rf5c68.cpp
 
 src/engine/platform/sound/oki/msm5232.cpp