diff --git a/CMakeLists.txt b/CMakeLists.txt
index a993d94..2f35f89 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -277,9 +277,11 @@ if(HAVE_MEMMEM)
 	add_definitions(-DHAVE_MEMMEM)
 endif()
 
-check_include_files(endian.h HAVE_ENDIAN_H)
-if(HAVE_ENDIAN_H)
-	add_definitions(-DHAVE_ENDIAN_H)
+if (NOT IOS)
+	check_include_files(endian.h HAVE_ENDIAN_H)
+	if(HAVE_ENDIAN_H)
+		add_definitions(-DHAVE_ENDIAN_H)
+	endif()
 endif()
 
 check_include_files(machine/endian.h HAVE_MACHINE_ENDIAN_H)
diff --git a/README.md b/README.md
index f1f8972..1dd6a67 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@ Built from https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-3.8.0.tar.gz
 Modifications:
 * Removed targets for apps, tests, install, uninstall.
 * Removed extra files like unneeded target sources, Makefiles, autoconf files.
+* Disabled endian.h check for iOS as it breaks build.
 
 ===