diff --git a/CMakeLists.txt b/CMakeLists.txt
index 74762470ce..c73f950a7c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,11 +24,14 @@ set (ORCT2_RESOURCE_DIR ${CMAKE_INSTALL_PREFIX}/share/${PROJECT}/)
 project(${PROJECT})
 
 add_definitions(-DORCT2_RESOURCE_DIR="${ORCT2_RESOURCE_DIR}")
+add_definitions(-DHAVE_CONFIG_H)
 
 # include lodepng header
 include_directories("lodepng/")
+# include speex header
+include_directories("libspeex/")
 # add source files
-file(GLOB_RECURSE ORCT2_SOURCES "src/*.c" "lodepng/*.c")
+file(GLOB_RECURSE ORCT2_SOURCES "src/*.c" "src/*.cpp" "libspeex/*.c" "lodepng/*.c")
 
 if (UNIX)
 	# force 32bit build for now and set necessary flags to compile code as is