diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4779087..9fe5837 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,6 @@
-cmake_minimum_required (VERSION 2.8.8)
+cmake_minimum_required (VERSION 3.0)
 include(CheckFunctionExists)
+include(CheckSymbolExists)
 include(CheckLibraryExists)
 include(CheckIncludeFiles)
 include(CheckTypeSize)
@@ -231,7 +232,7 @@ if(HAVE_GETENTROPY)
 	add_definitions(-DHAVE_GETENTROPY)
 endif()
 
-check_function_exists(getpagesize HAVE_GETPAGESIZE)
+check_symbol_exists(getpagesize unistd.h HAVE_GETPAGESIZE)
 if(HAVE_GETPAGESIZE)
 	add_definitions(-DHAVE_GETPAGESIZE)
 endif()