diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0da82a25..818d3773 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -140,6 +140,7 @@ add_library(lego1 SHARED
   LEGO1/mxmatrix.cpp
   LEGO1/mxmediamanager.cpp
   LEGO1/mxmediapresenter.cpp
+  LEGO1/mxmidimanager.cpp
   LEGO1/mxmidipresenter.cpp
   LEGO1/mxmusicpresenter.cpp
   LEGO1/mxnotificationmanager.cpp
@@ -272,4 +273,4 @@ if (MSVC)
   set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "/incremental:no")
   set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "/incremental:no /debug")
   set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "/incremental:no")
-endif()
\ No newline at end of file
+endif()