diff --git a/winsup/cygwin/fhandler/pty.cc b/winsup/cygwin/fhandler/pty.cc
index 664d7dbc6..03c859172 100644
--- a/winsup/cygwin/fhandler/pty.cc
+++ b/winsup/cygwin/fhandler/pty.cc
@@ -3222,6 +3222,11 @@ fhandler_pty_slave::setup_pseudoconsole ()
       return false;
     }
 
+  /* Set switch_to_nat_pipe regardless whether stdin is the pty or not
+     so that the non-cygwin app can work when it opens CONIN$. */
+  bool switch_to_nat_pipe_orig = get_ttyp ()->switch_to_nat_pipe;
+  get_ttyp ()->switch_to_nat_pipe = true;
+
   HANDLE hpConIn, hpConOut;
   if (get_ttyp ()->pcon_activated)
     { /* The pseudo console is already activated. */
@@ -3499,6 +3504,7 @@ cleanup_pseudo_console:
       CloseHandle (tmp);
     }
 fallback:
+  get_ttyp ()->switch_to_nat_pipe = switch_to_nat_pipe_orig;
   return false;
 }
 
diff --git a/winsup/cygwin/release/3.4.7 b/winsup/cygwin/release/3.4.7
index 2c305ec5f..941519ebc 100644
--- a/winsup/cygwin/release/3.4.7
+++ b/winsup/cygwin/release/3.4.7
@@ -9,3 +9,6 @@ Bug Fixes
 
 - Align behaviour of dirname in terms of leading slashes to POSIX:
   https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap04.html
+
+- Fix reading CONIN$ in non cygwin apps when stdin is not a pty.
+  Addresses https://cygwin.com/pipermail/cygwin/2023-April/253424.html