diff --git a/make/includes.in b/make/includes.in
index 9ff1bd8cf1..9eaf1d3dd5 100644
--- a/make/includes.in
+++ b/make/includes.in
@@ -28,7 +28,7 @@ ISCCFG_INCLUDES = @BIND9_ISCCFG_BUILDINCLUDE@ \
 DNS_INCLUDES = @BIND9_DNS_BUILDINCLUDE@ \
 	-I${top_srcdir}/lib/dns/include \
 	${FSTRM_CFLAGS} ${PROTOBUF_C_CFLAGS} \
-	${OPENSSL_CFLAGS}
+	${OPENSSL_CFLAGS} ${LMDB_CFLAGS}
 
 NS_INCLUDES = @BIND9_NS_BUILDINCLUDE@ \
 	-I${top_srcdir}/lib/ns/include