diff --git a/c_gen/c_type_maps.py b/c_gen/c_type_maps.py
index 503e2af..ac4a972 100644
--- a/c_gen/c_type_maps.py
+++ b/c_gen/c_type_maps.py
@@ -253,10 +253,10 @@
     if (!OF_VERSION_OKAY(version)) {
         return OF_OBJECT_INVALID;
     }
-    if (%(name)s == 0xffff) {
+    if (%(name)s == 0xfffe) {
         return OF_%(u_name)s_EXPERIMENTER;
     }
-    if (%(name)s == 0xfffe) {
+    if (%(name)s == 0xffff) {
         return OF_%(u_name)s_EXPERIMENTER_MISS;
     }
     if (%(name)s < 0 || %(name)s >= OF_%(u_name)s_ITEM_COUNT) {