diff --git a/miniupnpc/CMakeLists.txt b/miniupnpc/CMakeLists.txt
index 1aa95a8..0cacf3e 100644
--- a/miniupnpc/CMakeLists.txt
+++ b/miniupnpc/CMakeLists.txt
@@ -31,6 +31,7 @@ endif ()
 if (NOT WIN32)
   target_compile_definitions(miniupnpc-private INTERFACE
     MINIUPNPC_SET_SOCKET_TIMEOUT
+    MINIUPNPC_GET_SRC_ADDR
     _BSD_SOURCE _DEFAULT_SOURCE)
   if (NOT APPLE AND NOT CMAKE_SYSTEM_NAME MATCHES ".*BSD" AND NOT CMAKE_SYSTEM_NAME STREQUAL "SunOS")
     # add_definitions (-D_POSIX_C_SOURCE=200112L)