diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8338ab9..ef9070b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -286,11 +286,21 @@ 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)
+endif()
+
 check_include_files(err.h HAVE_ERR_H)
 if(HAVE_ERR_H)
 	add_definitions(-DHAVE_ERR_H)
 endif()
 
+check_include_files(netinet/ip.h HAVE_NETINET_IP_H)
+if(HAVE_NETINET_IP_H)
+	add_definitions(-DHAVE_NETINET_IP_H)
+endif()
+
 if(ENABLE_ASM)
 	if("${CMAKE_C_COMPILER_ABI}" STREQUAL "ELF")
 		if("${CMAKE_SYSTEM_PROCESSOR}" MATCHES "(x86_64|amd64)")