diff --git a/bindings/c/CMakeLists.txt b/bindings/c/CMakeLists.txt
index cfbad68c2e..00847c7268 100644
--- a/bindings/c/CMakeLists.txt
+++ b/bindings/c/CMakeLists.txt
@@ -153,6 +153,7 @@ if(NOT WIN32)
     COMMENT "Copy libfdb_c to use as external client for test")
   add_custom_target(external_client DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/libfdb_c.so)
   add_dependencies(fdb_c_unit_tests external_client)
+  add_dependencies(disconnected_timeout_unit_tests external_client)
 
   add_fdbclient_test(
     NAME fdb_c_setup_tests