diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5d93eff..f14680d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,9 @@ find_package(PkgConfig REQUIRED)
 pkg_check_modules(PJSIP "libpjproject")
 pkg_check_modules(LOG4CPP "log4cpp")
 
+add_definitions(${PJSIP_CFLAGS})
+add_definitions(${LOG4CPP_CFLAGS})
+
 include_directories(${PJSIP_INCLUDE_DIRS})
 include_directories(${LOG4CPP_INCLUDE_DIRS})
 include_directories(../mumlib/include)