diff --git a/errors.hpp b/errors.hpp
new file mode 100644
index 0000000..1fa4492
--- /dev/null
+++ b/errors.hpp
@@ -0,0 +1,51 @@
+#pragma once
+
+#include <stdexcept>
+
+namespace phosphor
+{
+namespace inventory
+{
+namespace manager
+{
+
+// TODO: Use proper error generation techniques
+// https://github.com/openbmc/openbmc/issues/1125
+
+/** @class InterfaceError
+ *  @brief Exception class for unrecognized interfaces.
+ */
+class InterfaceError final : public std::invalid_argument
+{
+    public:
+        ~InterfaceError() = default;
+        InterfaceError() = delete;
+        InterfaceError(const InterfaceError&) = delete;
+        InterfaceError(InterfaceError&&) = default;
+        InterfaceError& operator=(const InterfaceError&) = delete;
+        InterfaceError& operator=(InterfaceError&&) = default;
+
+        /** @brief Construct an interface error.
+         *
+         *  @param[in] msg - The message to be returned by what().
+         *  @param[in] iface - The failing interface name.
+         */
+        InterfaceError(
+            const char* msg,
+            const std::string& iface) :
+            std::invalid_argument(msg),
+            interface(iface) {}
+
+        /** @brief Log the exception message to the systemd journal. */
+        void log() const;
+
+    private:
+
+        std::string interface;
+};
+
+} // namespace manager
+} // namespace inventory
+} // namespace phosphor
+
+// vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4