diff --git a/3rdparty/iaxclient-2/lib/CMakeLists.txt b/3rdparty/iaxclient-2/lib/CMakeLists.txt
index 6df08a7..6d8637c 100644
--- a/3rdparty/iaxclient-2/lib/CMakeLists.txt
+++ b/3rdparty/iaxclient-2/lib/CMakeLists.txt
@@ -145,3 +145,5 @@ else()
     target_link_libraries(iaxclient_lib ${CMAKE_THREAD_LIBS_INIT}
         ${SPEEX_LIBRARIES} ${SPEEXDSP_LIBRARIES} ${GSM_LIBRARIES} ) 
 endif(WIN32)
+
+target_include_directories(iaxclient_lib PUBLIC ${PROJECT_SOURCE_DIR}/3rdparty/iaxclient-2/lib)