diff --git a/ares_rules.h b/ares_rules.h
index f94c5b59..44f08f80 100644
--- a/ares_rules.h
+++ b/ares_rules.h
@@ -68,11 +68,6 @@
  * Verify that some macros are actually defined.
  */
 
-#ifndef CARES_SIZEOF_LONG
-#  error "CARES_SIZEOF_LONG definition is missing!"
-   Error Compilation_aborted_CARES_SIZEOF_LONG_is_missing
-#endif
-
 #ifndef CARES_TYPEOF_ARES_SOCKLEN_T
 #  error "CARES_TYPEOF_ARES_SOCKLEN_T definition is missing!"
    Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_is_missing
@@ -91,15 +86,6 @@
 
 #define CareschkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1
 
-/*
- * Verify that the size previously defined and expected for long
- * is the same as the one reported by sizeof() at compile time.
- */
-
-typedef char
-  __cares_rule_01__
-    [CareschkszEQ(long, CARES_SIZEOF_LONG)];
-
 /*
  * Verify that the size previously defined and expected for
  * ares_socklen_t is actually the the same as the one reported