--- mlapronidl/apron_caml.c.orig	2020-09-11 09:30:57.000000000 -0600
+++ mlapronidl/apron_caml.c	2022-02-07 13:37:27.047537062 -0700
@@ -90,6 +90,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 /* ********************************************************************** */
@@ -200,6 +203,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 /* ********************************************************************** */
@@ -234,6 +240,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 void camlidl_apron_manager_check_exception(struct ap_manager_t* man, void* _ctx)
@@ -350,6 +359,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 /* ********************************************************************** */
@@ -408,6 +420,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 /* ********************************************************************** */
@@ -451,6 +466,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 value camlidl_apron_environment_ptr_c2ml(ap_environment_ptr* p)
@@ -508,6 +526,9 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };
 
 
@@ -554,4 +575,7 @@ struct custom_operations camlidl_apron_c
 #ifdef custom_compare_ext_default
   custom_compare_ext_default,
 #endif
+#ifdef custom_fixed_length_default
+  custom_fixed_length_default,
+#endif
 };