diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2aa95082b..fc04d0caa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,16 +53,12 @@ separate_arguments(OC_EXE_LINKER_FLAGS)
 set(OC_EXE_LINKER_FLAGS_DEBUG ${CMAKE_EXE_LINKER_FLAGS_DEBUG})
 separate_arguments(OC_EXE_LINKER_FLAGS_DEBUG)
 
-CHECK_CXX_COMPILER_FLAG("-std=gnu++0x" USE_GCC_STD_0X)
 CHECK_CXX_COMPILER_FLAG("-std=gnu++14" USE_GCC_STD_14)
 if(USE_GCC_STD_14)
 	if(OC_CXX_FLAGS MATCHES \\-std=gnu\\+\\+0x)
-		unset(HAVE_MAKE_UNIQUE CACHE)
 		list(REMOVE_ITEM OC_CXX_FLAGS "-std=gnu++0x")
 	endif()
 	list(APPEND OC_CXX_FLAGS "-std=gnu++14")
-elseif(USE_GCC_STD_0X)
-	list(APPEND OC_CXX_FLAGS "-std=gnu++0x")
 endif()
 
 if(MSVC_VERSION GREATER 1499)
@@ -149,7 +145,8 @@ include(CheckCXXSymbolExists)
 
 REQUIRE_CXX_SOURCE_COMPILES("#include <memory>\nint main() { std::unique_ptr<int> a; std::shared_ptr<int> b; }" HAVE_C11_SMART_PTRS)
 REQUIRE_CXX_SOURCE_COMPILES("int main() { static_assert(true, \"\"); }" HAVE_STATIC_ASSERT)
-CHECK_CXX_SOURCE_COMPILES("#include <memory>\nint main() { auto a = std::make_unique<int>(0); }" HAVE_MAKE_UNIQUE)
+REQUIRE_CXX_SOURCE_COMPILES("#include <memory>\nint main() { auto a = std::make_unique<int>(0); return !!a; }" HAVE_MAKE_UNIQUE)
+REQUIRE_CXX_SOURCE_COMPILES("#include <utility>\ntemplate<std::size_t... Is> int foo(std::index_sequence<Is...>) {return 0;} int main() { return foo(std::index_sequence_for<int,int>{}); }" HAVE_INDEX_SEQUENCE)
 REQUIRE_CXX_SOURCE_COMPILES("template<class... T> class C; int main() { return 0; }" HAVE_VARIADIC_TEMPLATES)
 
 # g++'s libstdc++ doesn't properly support <regex> until 4.9.
@@ -1046,8 +1043,7 @@ src/platform/StdSchedulerWin32.cpp
 src/platform/StdSchedulerPoll.cpp
 src/platform/StdScheduler.h
 src/platform/C4TimeMilliseconds.cpp 
-src/platform/C4TimeMilliseconds.h	
-src/platform/make_unique.h
+src/platform/C4TimeMilliseconds.h
 src/zlib/gzio.c
 src/zlib/gzio.h
 src/zlib/zutil.h
diff --git a/src/platform/PlatformAbstraction.h b/src/platform/PlatformAbstraction.h
index df3e4b098..3785d6985 100644
--- a/src/platform/PlatformAbstraction.h
+++ b/src/platform/PlatformAbstraction.h
@@ -89,10 +89,6 @@
 typedef ptrdiff_t ssize_t;
 #endif
 
-
-// std::make_unique
-#include "platform/make_unique.h"
-
 #if defined(__GNUC__)
 // Allow checks for correct printf-usage
 #define GNUC_FORMAT_ATTRIBUTE __attribute__ ((format (printf, 1, 2)))
diff --git a/src/platform/make_unique.h b/src/platform/make_unique.h
deleted file mode 100644
index f4293bf12..000000000
--- a/src/platform/make_unique.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/*
- * OpenClonk, http://www.openclonk.org
- *
- * Copyright (c) 2015, The OpenClonk Team and contributors
- *
- * Distributed under the terms of the ISC license; see accompanying file
- * "COPYING" for details.
- *
- * "Clonk" is a registered trademark of Matthes Bender, used with permission.
- * See accompanying file "TRADEMARK" for details.
- *
- * To redistribute this file separately, substitute the full license texts
- * for the above references.
- */
-
-#ifndef INC_make_unique
-#define INC_make_unique
-
-// C++14 std::make_unique
-#include <memory>
-#include <utility>
-#ifndef HAVE_MAKE_UNIQUE
-namespace detail {
-
-template<class T>
-typename std::enable_if<std::is_array<T>::value && std::extent<T>::value == 0, std::unique_ptr<T>>::type
-make_unique(size_t n)
-{
-	return std::unique_ptr<T>(new typename std::remove_extent<T>::type[n]());
-}
-
-template<class T, class ...Args>
-typename std::enable_if<!std::is_array<T>::value, std::unique_ptr<T>>::type
-make_unique(Args &&...args)
-{
-	return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-}
-
-}
-namespace std { using ::detail::make_unique; }
-#endif
-
-#endif