diff --git a/external/CMakeLists.txt b/external/CMakeLists.txt
index 245758d9..f0d363e3 100644
--- a/external/CMakeLists.txt
+++ b/external/CMakeLists.txt
@@ -99,3 +99,7 @@ else()
 endif()
 
 add_subdirectory(db_drivers)
+set(LMDB_STATIC ${LMDB_STATIC} PARENT_SCOPE)
+set(LMDB_INCLUDE ${LMDB_INCLUDE} PARENT_SCOPE)
+set(LMDB_LIBRARY ${LMDB_LIBRARY} PARENT_SCOPE)
+set(LMDB_LIBRARY_DIRS ${LMDB_LIBRARY_DIRS} PARENT_SCOPE)