diff --git a/src/shared/util.c b/src/shared/util.c
index 74d4367..0e71fda 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -536,6 +536,12 @@ void *util_iov_push_u8(struct iovec *iov, uint8_t val)
 	return p;
 }
 
+void *util_iov_append(struct iovec *iov, const void *data, size_t len)
+{
+	iov->iov_base = realloc(iov->iov_base, iov->iov_len + len);
+	return util_iov_push_mem(iov, len, data);
+}
+
 void *util_iov_pull(struct iovec *iov, size_t len)
 {
 	if (!iov)
diff --git a/src/shared/util.h b/src/shared/util.h
index accacc7..a8ba234 100644
--- a/src/shared/util.h
+++ b/src/shared/util.h
@@ -175,6 +175,7 @@ void *util_iov_push_be24(struct iovec *iov, uint32_t val);
 void *util_iov_push_le16(struct iovec *iov, uint16_t val);
 void *util_iov_push_be16(struct iovec *iov, uint16_t val);
 void *util_iov_push_u8(struct iovec *iov, uint8_t val);
+void *util_iov_append(struct iovec *iov, const void *data, size_t len);
 void *util_iov_pull(struct iovec *iov, size_t len);
 void *util_iov_pull_mem(struct iovec *iov, size_t len);
 void *util_iov_pull_le64(struct iovec *iov, uint64_t *val);