diff --git a/app/src/buffer_util.h b/app/src/buffer_util.h
index 4bfd08d3..a79014b1 100644
--- a/app/src/buffer_util.h
+++ b/app/src/buffer_util.h
@@ -18,6 +18,11 @@ buffer_write32be(uint8_t *buf, uint32_t value) {
     buf[3] = value;
 }
 
+static inline uint16_t
+buffer_read16be(const uint8_t *buf) {
+    return (buf[0] << 8) | buf[1];
+}
+
 static inline uint32_t
 buffer_read32be(const uint8_t *buf) {
     return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];