diff --git a/server/core/test/CMakeLists.txt b/server/core/test/CMakeLists.txt
index 1dec62889..35bced9e6 100644
--- a/server/core/test/CMakeLists.txt
+++ b/server/core/test/CMakeLists.txt
@@ -4,7 +4,7 @@ add_executable(test_filter testfilter.c)
 add_executable(test_adminusers testadminusers.c)
 target_link_libraries(test_hash crypto ssl pthread log_manager fullcore)
 target_link_libraries(test_spinlock crypto ssl pthread log_manager fullcore)
-target_link_libraries(test_filter crypto ssl pthread log_manager fullcore)
+target_link_libraries(test_filter crypto ssl pthread log_manager fullcore rt)
 target_link_libraries(test_adminusers crypto crypt ${EMBEDDED_LIB} ssl fullcore rt m z)
 add_test(TestHash test_hash)
 add_test(TestSpinlock test_spinlock)