diff --git a/ubi/Makefile.am.include b/ubi/Makefile.am.include
new file mode 100644
index 0000000..7bcfcb2
--- /dev/null
+++ b/ubi/Makefile.am.include
@@ -0,0 +1,2 @@
+phosphor_image_updater_SOURCES += \
+	%reldir%/flash.cpp
diff --git a/ubi/flash.cpp b/ubi/flash.cpp
new file mode 100644
index 0000000..39015bd
--- /dev/null
+++ b/ubi/flash.cpp
@@ -0,0 +1,29 @@
+#include "activation.hpp"
+#include "config.h"
+
+namespace phosphor
+{
+namespace software
+{
+namespace updater
+{
+
+void Activation::flashWrite()
+{
+    auto method = bus.new_method_call(SYSTEMD_BUSNAME, SYSTEMD_PATH,
+                                      SYSTEMD_INTERFACE, "StartUnit");
+    method.append("obmc-flash-bmc-ubirw.service", "replace");
+    bus.call_noreply(method);
+
+    auto roServiceFile = "obmc-flash-bmc-ubiro@" + versionId + ".service";
+    method = bus.new_method_call(SYSTEMD_BUSNAME, SYSTEMD_PATH,
+                                 SYSTEMD_INTERFACE, "StartUnit");
+    method.append(roServiceFile, "replace");
+    bus.call_noreply(method);
+
+    return;
+}
+
+} // namespace updater
+} // namespace software
+} // namepsace phosphor