diff --git a/lib/isc/include/isc/endian.h b/lib/isc/include/isc/endian.h
index 3c7ffbc298..153fa00f41 100644
--- a/lib/isc/include/isc/endian.h
+++ b/lib/isc/include/isc/endian.h
@@ -13,8 +13,7 @@
 
 #pragma once
 
-#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || \
-	defined(__OpenBSD__) || defined(__bsdi__)
+#ifdef HAVE_SYS_ENDIAN_H
 
 #include <sys/endian.h>
 
@@ -32,7 +31,7 @@
 #define le64toh(x) letoh64(x)
 #endif /* !be16toh */
 
-#elif defined __APPLE__
+#elif defined(__APPLE__)
 
 /*
  * macOS has its own byte-swapping routines, so use these.
diff --git a/meson.build b/meson.build
index 03f03f71f2..91d4924356 100644
--- a/meson.build
+++ b/meson.build
@@ -538,6 +538,7 @@ foreach h : [
     'regex.h',
     'stdckdint.h',
     'sys/mman.h',
+    'sys/endian.h',
     'sys/select.h',
     'sys/sockio.h',
     'sys/sysctl.h',