diff --git a/cmake-proxies/portmidi/CMakeLists.txt b/cmake-proxies/portmidi/CMakeLists.txt
index af13cae7b..50d24916b 100644
--- a/cmake-proxies/portmidi/CMakeLists.txt
+++ b/cmake-proxies/portmidi/CMakeLists.txt
@@ -3,6 +3,12 @@ add_library( ${TARGET} STATIC )
 
 def_vars()
 
+if( CMAKE_SYSTEM_NAME MATCHES "Linux|FreeBSD" )
+   if( ${_OPT}use_pa_alsa )
+      find_package( ALSA )
+   endif()
+endif()
+
 list( APPEND SOURCES
    PRIVATE
       ${TARGET_ROOT}/pm_common/portmidi.c