diff --git a/NEWS b/NEWS
index 1fdc3f7c9e8..3562198d0e7 100644
--- a/NEWS
+++ b/NEWS
@@ -58,6 +58,7 @@ PHP                                                                        NEWS
 
 - Standard:
   . Unserializing the uppercase 'S' tag is now deprecated. (timwolla)
+  . Enables crc32 auxiliary detection on OpenBSD. (David Carlier)
 
 - Streams:
   . Implemented GH-15155 (Stream context is lost when custom stream wrapper is
diff --git a/ext/standard/config.m4 b/ext/standard/config.m4
index 314151726d1..acd32d6f14b 100644
--- a/ext/standard/config.m4
+++ b/ext/standard/config.m4
@@ -346,7 +346,7 @@ dnl
 
 PHP_CHECK_FUNC(res_search, resolv, socket)
 
-AC_CHECK_FUNCS([posix_spawn_file_actions_addchdir_np])
+AC_CHECK_FUNCS([posix_spawn_file_actions_addchdir_np elf_aux_info])
 
 dnl
 dnl Obsolete check for strptime() declaration. The strptime, where available,
diff --git a/ext/standard/crc32.c b/ext/standard/crc32.c
index 9b598489d3f..d9ccd78feb5 100644
--- a/ext/standard/crc32.c
+++ b/ext/standard/crc32.c
@@ -28,7 +28,7 @@
 #  include <asm/hwcap.h>
 # elif defined(__APPLE__)
 #  include <sys/sysctl.h>
-# elif defined(__FreeBSD__)
+# elif defined(HAVE_ELF_AUX_INFO)
 #  include <sys/auxv.h>
 
 static unsigned long getauxval(unsigned long key) {