diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7f9b19e..e0df712 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,7 +51,7 @@ find_package(Curses REQUIRED)
 find_package(PulseAudio REQUIRED)
 find_package(CODEC2)
 
-include_directories(SYSTEM ${LIBSNDFILE_INCLUDE_DIR} ${MBE_INCLUDE_DIR} ${ITPP_INCLUDE_DIR} ${PULSEAUDIO_INCLUDE_DIRS} ${CURSES_INCLUDE_DIR})
+include_directories(SYSTEM ${LIBSNDFILE_INCLUDE_DIR} ${MBE_INCLUDE_DIR} ${ITPP_INCLUDE_DIR} ${PULSEAUDIO_INCLUDE_DIRS} ${CURSES_INCLUDE_DIRS})
 set(LIBS ${MBE_LIBRARY} ${LIBSNDFILE_LIBRARY} ${ITPP_LIBRARY} ${PULSEAUDIO_SIMPLE_LIBRARY} ${PULSEAUDIO_LIBRARY} ${CURSES_LIBRARIES})
 
 if(RTLSDR_FOUND)