diff --git a/meson.build b/meson.build
index 681dd7a..ff73738 100644
--- a/meson.build
+++ b/meson.build
@@ -138,12 +138,6 @@
 )
 conf_data.set('SENSOR_POLLING_TIME', get_option('sensor-polling-time'))
 
-oem_files = []
-if get_option('oem-ampere').enabled()
-    add_project_arguments('-DOEM_AMPERE', language : 'cpp')
-    subdir('oem/ampere')
-endif
-
 configure_file(output: 'config.h', configuration: conf_data)
 
 add_project_arguments(
@@ -197,6 +191,9 @@
     include_type: 'system',
 )
 
+if get_option('oem-ampere').enabled()
+    add_project_arguments('-DOEM_AMPERE', language : 'cpp')
+endif
 
 libpldmutils_headers = ['.']
 libpldmutils = library(
@@ -231,6 +228,11 @@
     stdplus,
 ]
 
+oem_files = []
+if get_option('oem-ampere').enabled()
+    subdir('oem/ampere')
+endif
+
 if get_option('libpldmresponder').allowed()
     subdir('libpldmresponder')
     deps += [libpldmresponder_dep]