--- audio/CMakeLists.txt.orig	2020-03-16 02:04:05 UTC
+++ audio/CMakeLists.txt
@@ -10,9 +10,10 @@ if(WIN32)
 endif()
 
 # Add RtMidi dependencies on Linux
-if(UNIX AND NOT APPLE)
+if(CMAKE_SYSTEM_NAME MATCHES "Linux")
   add_definitions(-D__LINUX_ALSA__)
   find_package(ALSA)
+  set(RTMIDI_INCLUDES ${ALSA_INCLUDE_DIRS})
   set(RTMIDI_DEPENDENCIES ${ALSA_LIBRARY} pthread)
 endif()
 
@@ -30,5 +31,5 @@ target_link_libraries(FeAudio ${RTMIDI_DEPENDENCIES})
 
 find_package(SDL2 REQUIRED)
 
-target_include_directories(FeAudio SYSTEM PUBLIC ${SDL2_mixer_INCLUDE_DIR})
+target_include_directories(FeAudio SYSTEM PUBLIC ${SDL2_mixer_INCLUDE_DIR} ${RTMIDI_INCLUDES})
 target_link_libraries(FeAudio ${SDL2_mixer_LIBRARY})
