diff --git a/example/calculator-server.cpp b/example/calculator-server.cpp
index 7ee4218..2d0efca 100644
--- a/example/calculator-server.cpp
+++ b/example/calculator-server.cpp
@@ -1,5 +1,4 @@
 #include <net/poettering/Calculator/client.hpp>
-#include <net/poettering/Calculator/error.hpp>
 #include <net/poettering/Calculator/server.hpp>
 #include <sdbusplus/server.hpp>
 
@@ -29,7 +28,7 @@
      */
     int64_t divide(int64_t x, int64_t y) override
     {
-        using sdbusplus::error::net::poettering::calculator::DivisionByZero;
+        using sdbusplus::error::net::poettering::Calculator::DivisionByZero;
         if (y == 0)
         {
             status(State::Error);