diff --git a/docs/doxygen/mainpages/const_wxusedef.h b/docs/doxygen/mainpages/const_wxusedef.h
index 6e013cae7f..c34151c662 100644
--- a/docs/doxygen/mainpages/const_wxusedef.h
+++ b/docs/doxygen/mainpages/const_wxusedef.h
@@ -221,6 +221,7 @@ library:
 @itemdef{wxUSE_STATUSBAR, Use wxStatusBar class.}
 @itemdef{wxUSE_STC, Use wxStyledTextCtrl.}
 @itemdef{wxUSE_STDPATHS, Use wxStandardPaths class.}
+@itemdef{wxUSE_STD_IOSTREAM, Use standard stream classes in addition to or, in wxDocument, instead of, wx streams.}
 @itemdef{wxUSE_STOPWATCH, Use wxStopWatch class.}
 @itemdef{wxUSE_STREAMS, Enable stream classes.}
 @itemdef{wxUSE_SVG, Use wxSVGFileDC class.}
diff --git a/include/wx/android/setup.h b/include/wx/android/setup.h
index 5a8063ef31..6ec8a23ed0 100644
--- a/include/wx/android/setup.h
+++ b/include/wx/android/setup.h
@@ -272,11 +272,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/gtk/setup.h b/include/wx/gtk/setup.h
index 7e7a69ec46..0d7947785a 100644
--- a/include/wx/gtk/setup.h
+++ b/include/wx/gtk/setup.h
@@ -273,11 +273,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/msw/setup.h b/include/wx/msw/setup.h
index 43e84a82a3..f5b66d6949 100644
--- a/include/wx/msw/setup.h
+++ b/include/wx/msw/setup.h
@@ -273,11 +273,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/osx/setup.h b/include/wx/osx/setup.h
index 678b8ea182..ed5f34f586 100644
--- a/include/wx/osx/setup.h
+++ b/include/wx/osx/setup.h
@@ -279,11 +279,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/setup_inc.h b/include/wx/setup_inc.h
index 2562857e09..50d248136c 100644
--- a/include/wx/setup_inc.h
+++ b/include/wx/setup_inc.h
@@ -269,11 +269,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/include/wx/univ/setup.h b/include/wx/univ/setup.h
index cdbcb73daf..d86ed7d29a 100644
--- a/include/wx/univ/setup.h
+++ b/include/wx/univ/setup.h
@@ -272,11 +272,15 @@
 // disabled, wx streams are used instead.
 //
 // Notice that enabling this does not replace wx streams with std streams
-// everywhere, in a lot of places wx streams are used no matter what.
+// everywhere, in a lot of places wx streams are used no matter what and in
+// other places this option enables the use of standard streams in _addition_
+// to the wx ones. The only exception is wxDocument which defines functions
+// working with standard streams only when this option is on, and only
+// functions working with wx streams when it's off.
 //
 // Default is 1.
 //
-// Recommended setting: 1.
+// Recommended setting: 1, there should be no reason to disable it.
 #define wxUSE_STD_IOSTREAM  1
 
 // ----------------------------------------------------------------------------
diff --git a/interface/wx/log.h b/interface/wx/log.h
index 116bb19cff..f0c6927398 100644
--- a/interface/wx/log.h
+++ b/interface/wx/log.h
@@ -790,8 +790,9 @@ public:
 
     This class can be used to redirect the log messages to a C++ stream.
 
-    Please note that this class is only available if wxWidgets was compiled with
-    the standard iostream library support (@c wxUSE_STD_IOSTREAM must be on).
+    @note
+        This class is not available if `wxUSE_STD_IOSTREAM` is set to 0 (which
+        is done by `--disable-std_iostreams` option when using configure).
 
     @library{wxbase}
     @category{logging}
diff --git a/interface/wx/textctrl.h b/interface/wx/textctrl.h
index 7b3ed5e1e1..7b60ebaf3e 100644
--- a/interface/wx/textctrl.h
+++ b/interface/wx/textctrl.h
@@ -1850,12 +1850,8 @@ public:
     ostream object to a wxTextCtrl instead.
 
     @note
-        Some compilers and/or build configurations don't support multiply
-        inheriting wxTextCtrl from @c std::streambuf in which case this class is
-        not compiled in.
-        You also must have @c wxUSE_STD_IOSTREAM option on (i.e. set to 1) in your
-        @c setup.h to be able to use it. Under Unix, specify @c \--enable-std_iostreams
-        switch when running configure for this.
+        This class is not available if `wxUSE_STD_IOSTREAM` is set to 0 (which
+        is done by `--disable-std_iostreams` option when using configure).
 
     Example of usage: