diff --git a/libc-test/build.rs b/libc-test/build.rs
index 29e43f6d..795330ab 100644
--- a/libc-test/build.rs
+++ b/libc-test/build.rs
@@ -538,12 +538,6 @@ fn main() {
             "KERN_USERMOUNT" |
             "KERN_ARND" if openbsd => true,
 
-            // These constants were added in OpenBSD 6.2
-            "EV_RECEIPT" | "EV_DISPATCH" if openbsd => true,
-
-            // These constants were added in OpenBSD 6.3
-            "MAP_STACK" if openbsd => true,
-
             // These are either unimplemented or optionally built into uClibc
             "LC_CTYPE_MASK" | "LC_NUMERIC_MASK" | "LC_TIME_MASK" | "LC_COLLATE_MASK" | "LC_MONETARY_MASK" | "LC_MESSAGES_MASK" |
             "MADV_MERGEABLE" | "MADV_UNMERGEABLE" | "MADV_HWPOISON" | "IPV6_ADD_MEMBERSHIP" | "IPV6_DROP_MEMBERSHIP" | "IPV6_MULTICAST_LOOP" | "IPV6_V6ONLY" |