diff --git a/tdm/ConfigureChecks.cmake b/tdm/ConfigureChecks.cmake
index 8ebba8e6d..d0080f4f1 100644
--- a/tdm/ConfigureChecks.cmake
+++ b/tdm/ConfigureChecks.cmake
@@ -18,7 +18,11 @@ check_function_exists( getdomainname HAVE_GETDOMAINNAME )
 check_function_exists( initgroups HAVE_INITGROUPS )
 check_function_exists( mkstemp HAVE_MKSTEMP )
 check_function_exists( setproctitle HAVE_SETPROCTITLE )
+tde_save_and_set( CMAKE_REQUIRED_DEFINITIONS "-D_GNU_SOURCE" "-D__BSD_VISIBLE=1" )
+tde_save_and_set( CMAKE_REQUIRED_LIBRARIES "pthread" )
 check_function_exists( pthread_setname_np HAVE_PTHREAD_SETNAME_NP )
+tde_restore( CMAKE_REQUIRED_DEFINITIONS )
+tde_restore( CMAKE_REQUIRED_LIBRARIES )
 check_function_exists( sysinfo HAVE_SYSINFO )
 check_function_exists( strnlen HAVE_STRNLEN )
 check_function_exists( getifaddrs HAVE_GETIFADDRS )
diff --git a/tdm/backend/CMakeLists.txt b/tdm/backend/CMakeLists.txt
index f09704486..cb0cd3d3f 100644
--- a/tdm/backend/CMakeLists.txt
+++ b/tdm/backend/CMakeLists.txt
@@ -49,6 +49,6 @@ tde_add_executable( tdm
     process.c protodpy.c reset.c resource.c rpcauth.c
     server.c session.c sessreg.c socket.c streams.c
     util.c xdmauth.c xdmcp.c
-  LINK X11 ${XAU_LIBRARIES} ${DBUS_LIBRARIES} ${CRYPT_LIBRARY} ${PAM_LIBRARY} ${UTIL_LIBRARY} ${XDMCP_LIBRARIES}
+  LINK X11 pthread ${XAU_LIBRARIES} ${DBUS_LIBRARIES} ${CRYPT_LIBRARY} ${PAM_LIBRARY} ${UTIL_LIBRARY} ${XDMCP_LIBRARIES}
   DESTINATION ${BIN_INSTALL_DIR}
 )
diff --git a/tdm/backend/dm.c b/tdm/backend/dm.c
index 627d2c23d..9168b88b5 100644
--- a/tdm/backend/dm.c
+++ b/tdm/backend/dm.c
@@ -54,6 +54,8 @@ from the copyright holder.
 #endif
 
 #ifdef HAVE_PTHREAD_SETNAME_NP
+#define _GNU_SOURCE
+#define __BSD_VISIBLE 1
 #include <pthread.h>
 #endif /* pthread_setname_np() */