diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index b3f3d007a..d7aba2e80 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -710,7 +710,6 @@ if (NOT LIBSERIALDV_FOUND OR LIBSERIALDV_EXTERNAL)
             TEST_COMMAND ""
             )
     ExternalProject_Get_Property(serialdv source_dir binary_dir)
-    set_global(DSDCC_DEPENDS ${DSDCC_DEPENDS} serialdv)
     set(LIBSERIALDV_FOUND ON CACHE INTERNAL "")
     set(LIBSERIALDV_EXTERNAL ON CACHE INTERNAL "")
     set(LIBSERIALDV_INCLUDE_DIR "${source_dir}" CACHE INTERNAL "")
@@ -747,8 +746,6 @@ if ((NOT LIBDSDCC_FOUND OR LIBDSDCC_EXTERNAL) AND LIBMBE_FOUND)
             -DBUILD_TOOL=OFF -DUSE_MBELIB=${USE_MBELIB}
             -DLIBMBE_INCLUDE_DIR=${LIBMBE_INCLUDE_DIR}
             -DLIBMBE_LIBRARY=${LIBMBE_LIBRARIES}
-            -DLIBSERIALDV_INCLUDE_DIR=${LIBSERIALDV_INCLUDE_DIR}
-            -DLIBSERIALDV_LIBRARY=${LIBSERIALDV_LIBRARY}
             BUILD_BYPRODUCTS "${LIBDSDCC_LIBRARIES}"
             INSTALL_COMMAND ""
             TEST_COMMAND ""