diff --git a/flash-ipmi.cpp b/flash-ipmi.cpp
index daaab5e..ab294c3 100644
--- a/flash-ipmi.cpp
+++ b/flash-ipmi.cpp
@@ -55,3 +55,9 @@
     /* TODO: implement. */
     return false;
 }
+
+bool FlashUpdate::hashData(uint32_t offset, const std::vector<uint8_t>& bytes)
+{
+    /* TODO: implement. */
+    return false;
+}