diff --git a/depends/packages/bdb.mk b/depends/packages/bdb.mk
index 1c587acc4..d8504201b 100644
--- a/depends/packages/bdb.mk
+++ b/depends/packages/bdb.mk
@@ -1,34 +1,35 @@
 package=bdb
 $(package)_version=5.3.28
 $(package)_download_path=https://download.oracle.com/berkeley-db
 $(package)_file_name=db-$($(package)_version).NC.tar.gz
 $(package)_sha256_hash=76a25560d9e52a198d37a31440fd07632b5f1f8f9f2b6d5438f4bc3e7c9013ef
 $(package)_build_subdir=build_unix
 
 define $(package)_set_vars
 $(package)_config_opts=--disable-shared --enable-cxx --disable-replication
 $(package)_config_opts_mingw32=--enable-mingw
 $(package)_config_opts_linux=--with-pic
 $(package)_cxxflags=-std=c++11
+$(package)_cppflags_mingw32=-DUNICODE -D_UNICODE
 endef
 
 define $(package)_preprocess_cmds
   cd src &&\
   sed -i.old 's/__atomic_compare_exchange/__atomic_compare_exchange_db/' dbinc/atomic.h && \
   sed -i.old 's/atomic_init/atomic_init_db/' dbinc/atomic.h mp/mp_region.c mp/mp_mvcc.c mp/mp_fget.c mutex/mut_method.c mutex/mut_tas.c && \
   sed -i.old 's/WinIoCtl.h/winioctl.h/' dbinc/win_db.h &&\
   cd .. &&\
   cp -f $(BASEDIR)/config.guess $(BASEDIR)/config.sub dist
 endef
 
 define $(package)_config_cmds
   ../dist/$($(package)_autoconf)
 endef
 
 define $(package)_build_cmds
   $(MAKE) -j$(JOBS) libdb_cxx-5.3.a libdb-5.3.a
 endef
 
 define $(package)_stage_cmds
   $(MAKE) DESTDIR=$($(package)_staging_dir) install_lib install_include
 endef