diff --git a/extensions/Library_ldapbe2.mk b/extensions/Library_ldapbe2.mk
index 0eb2699e7014..0224376a48bb 100644
--- a/extensions/Library_ldapbe2.mk
+++ b/extensions/Library_ldapbe2.mk
@@ -36,6 +36,7 @@ $(eval $(call gb_Library_use_libraries,ldapbe2,\
 
 ifeq ($(OS),WNT)
 $(eval $(call gb_Library_use_system_win32_libs,ldapbe2,\
+	boost_headers \
 	wldap32 \
 ))
 else # 0S!=WNT