diff --git a/include/nlohmann/detail/macro_scope.hpp b/include/nlohmann/detail/macro_scope.hpp
index b14f35e04..412858eeb 100644
--- a/include/nlohmann/detail/macro_scope.hpp
+++ b/include/nlohmann/detail/macro_scope.hpp
@@ -32,11 +32,7 @@
 #endif
 
 #ifdef JSON_HAS_CPP_17
-    #if __has_include(<optional>)
-        #include <optional>
-    #elif __has_include(<experimental/optional>)
-        #include <experimental/optional>
-    #endif
+    #include <optional>
 #endif
 
 // disable float-equal warnings on GCC/clang
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index 05262b84c..897d6b682 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -2109,11 +2109,7 @@ JSON_HEDLEY_DIAGNOSTIC_POP
 #endif
 
 #ifdef JSON_HAS_CPP_17
-    #if __has_include(<optional>)
-        #include <optional>
-    #elif __has_include(<experimental/optional>)
-        #include <experimental/optional>
-    #endif
+    #include <optional>
 #endif
 
 // disable float-equal warnings on GCC/clang