diff --git a/package/berkeleydb/berkeleydb.mk b/package/berkeleydb/berkeleydb.mk
index 1c121370db..b2d4b689f3 100644
--- a/package/berkeleydb/berkeleydb.mk
+++ b/package/berkeleydb/berkeleydb.mk
@@ -26,6 +26,7 @@ BERKELEYDB_BINARIES = db_archive db_checkpoint db_deadlock db_dump \
 define BERKELEYDB_CONFIGURE_CMDS
 	(cd $(@D)/build_unix; rm -rf config.cache; \
 		$(TARGET_CONFIGURE_OPTS) \
+		CFLAGS="$(TARGET_CFLAGS) -std=gnu99" \
 		$(TARGET_CONFIGURE_ARGS) \
 		../dist/configure $(QUIET) \
 		--target=$(GNU_TARGET_NAME) \