diff --git a/error-HostEvent.hpp b/error-HostEvent.hpp
new file mode 100644
index 0000000..f8abf21
--- /dev/null
+++ b/error-HostEvent.hpp
@@ -0,0 +1,37 @@
+#pragma once
+
+#include <sdbusplus/exception.hpp>
+
+namespace sdbusplus
+{
+namespace org
+{
+namespace open_power
+{
+namespace Host
+{
+namespace Event
+{
+namespace Error
+{
+
+struct Event final : public sdbusplus::exception_t
+{
+    static constexpr auto errName = "org.open_power.Host.Event.Error.Event";
+    static constexpr auto errDesc =
+            "A host system event was received";
+    static constexpr auto errWhat =
+            "org.open_power.Host.Event.Error.Event: A host system event was received";
+
+    const char* name() const noexcept override;
+    const char* description() const noexcept override;
+    const char* what() const noexcept override;
+};
+
+} // namespace Error
+} // namespace Event
+} // namespace Host
+} // namespace open_power
+} // namespace org
+} // namespace sdbusplus
+