diff -urN pinentry-1.2.1.orig/configure.ac pinentry-1.2.1/configure.ac
--- pinentry-1.2.1.orig/configure.ac	2023-12-27 14:38:13.605366651 +0300
+++ pinentry-1.2.1/configure.ac	2023-12-27 14:38:53.221364994 +0300
@@ -642,15 +642,6 @@
 
 if test "$pinentry_tqt" != "no"; then
 
-  if test "$pinentry_qt" = "yes"; then
-    AC_MSG_ERROR([[
-    ***
-    *** Building both Qt and TQt pinentries is not supported.
-    *** Use --disable-pinentry-qt and --disable-pinentry-qt4
-    *** if you want the TQt pinentry.
-    ***]])
-  fi
-
   PKG_CHECK_MODULES(PINENTRY_TQT, tqt,
                     have_tqt_libs=yes,
                     [PKG_CHECK_MODULES(PINENTRY_TQT, tqt-mt,