diff --git a/zeiterfassungcorelib/cpp14polyfills.h b/zeiterfassungcorelib/cpp14polyfills.h
deleted file mode 100644
index d345a00..0000000
--- a/zeiterfassungcorelib/cpp14polyfills.h
+++ /dev/null
@@ -1,43 +0,0 @@
-#pragma once
-
-#if __cplusplus < 201402L && _MSC_VER < 1800
-
-// std includes
-#include <memory>
-#include <cstddef>
-#include <memory>
-#include <type_traits>
-#include <utility>
-
-namespace std {
-    template<class T> struct _Unique_if {
-        typedef unique_ptr<T> _Single_object;
-    };
-
-    template<class T> struct _Unique_if<T[]> {
-        typedef unique_ptr<T[]> _Unknown_bound;
-    };
-
-    template<class T, size_t N> struct _Unique_if<T[N]> {
-        typedef void _Known_bound;
-    };
-
-    template<class T, class... Args>
-        typename _Unique_if<T>::_Single_object
-        make_unique(Args&&... args) {
-            return unique_ptr<T>(new T(std::forward<Args>(args)...));
-        }
-
-    template<class T>
-        typename _Unique_if<T>::_Unknown_bound
-        make_unique(size_t n) {
-            typedef typename remove_extent<T>::type U;
-            return unique_ptr<T>(new U[n]());
-        }
-
-    template<class T, class... Args>
-        typename _Unique_if<T>::_Known_bound
-        make_unique(Args&&...) = delete;
-}
-
-#endif // __cplusplus < 201402L
diff --git a/zeiterfassungcorelib/zeiterfassungcorelib.pro b/zeiterfassungcorelib/zeiterfassungcorelib.pro
index 225c063..4b28f2b 100644
--- a/zeiterfassungcorelib/zeiterfassungcorelib.pro
+++ b/zeiterfassungcorelib/zeiterfassungcorelib.pro
@@ -30,8 +30,7 @@ SOURCES += \
            replies/updatetimeassignmentreply.cpp \
            replies/zeiterfassungreply.cpp
 
-HEADERS += cpp14polyfills.h \
-           zeiterfassungapi.h \
+HEADERS += zeiterfassungapi.h \
            zeiterfassungcorelib_global.h \
            zeiterfassungsettings.h \
            replies/createbookingreply.h \