diff --git a/linux.md b/linux.md
index 0c5ff425..492e9eb9 100644
--- a/linux.md
+++ b/linux.md
@@ -48,7 +48,6 @@ Some features totally ignored:
 * ethernet
 * serial port
 * debugger
-* speech (currently it hangs the emulator)
 
 The rest is in a very usable state.
 
@@ -85,7 +84,6 @@ This is based on Qt.
 * the app runs at 60FPS with correction for uneven timer deltas.
 * full speed when disk spins execute up to 5 ms real wall clock of emulator code (then returns to Qt)
 * (standard) audio is supported and there are a few configuration options to tune the latency (default very conservative 200ms)
-* plain mockingboard is supported as well (not speech, which hangs the emulator)
 * Open Apple and Solid Apple can be emulated using AltGr and Menu (unfortunately, Alt does not work well)
 
 ### sa2
diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index 22fb593a..b25561f2 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -10,6 +10,7 @@ set(SOURCE_FILES
   Debugger/Debugger_Parser.cpp
   Debugger/Debugger_Range.cpp
 
+  SSI263.cpp
   Speaker.cpp
   SoundCore.cpp
   AY8910.cpp
@@ -82,6 +83,8 @@ set(SOURCE_FILES
   )
 
 set(HEADER_FILES
+  SSI263.h
+  SSI263Phonemes.h
   Speaker.h
   SoundCore.h
   AY8910.h