diff --git a/src/Unittests/CMakeLists.txt b/src/Unittests/CMakeLists.txt
index 037a207a..ab128f5e 100644
--- a/src/Unittests/CMakeLists.txt
+++ b/src/Unittests/CMakeLists.txt
@@ -44,7 +44,7 @@ if ( OPENMESH_BUILD_UNIT_TESTS )
       foreach(CONFIG ${CMAKE_CONFIGURATION_TYPES})
         string(TOUPPER ${CONFIG} UPCONFIG)
         set_target_properties(unittests PROPERTIES RUNTIME_OUTPUT_DIRECTORY_${UPCONFIG} ${OUTPUT_DIR})
-        set_target_properties(unittests_customvec PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${OUTPUT_DIR})
+        set_target_properties(unittests_customvec PROPERTIES RUNTIME_OUTPUT_DIRECTORY_${UPCONFIG} ${OUTPUT_DIR})
     endforeach()