diff --git a/kpdf/configure.in.in b/kpdf/configure.in.in
index f8c6eac2..0bef4a0c 100644
--- a/kpdf/configure.in.in
+++ b/kpdf/configure.in.in
@@ -118,7 +118,7 @@ AC_ARG_ENABLE(force-kpdf-drm,
 )
 
 kde_save_CXXFLAGS="$CXXFLAGS"
-CXXFLAGS="$CXXFLAGS $qt_includes"
+CXXFLAGS="$CXXFLAGS $tqt_includes"
 KDE_CHECK_COMPILER_FLAG([fno-regmove], SUPPORTS_NOREGMOVE=true, SUPPORTS_NOREGMOVE=false)
 if test "x$SUPPORTS_NOREGMOVE" = xtrue; then
 	NOREGMOVE="-fno-regmove"
diff --git a/kviewshell/plugins/djvu/libdjvu/configure.in.in b/kviewshell/plugins/djvu/libdjvu/configure.in.in
index 9af3757d..b3ebeec6 100644
--- a/kviewshell/plugins/djvu/libdjvu/configure.in.in
+++ b/kviewshell/plugins/djvu/libdjvu/configure.in.in
@@ -379,7 +379,7 @@ if test x$acx_cothread != xno ; then
   AC_MSG_CHECKING([whether libgcc contains the cothread patch])
   AC_LANG_PUSH([C++])
   kde_save_CXXFLAGS="$CXXFLAGS"
-  CXXFLAGS="$CXXFLAGS $qt_includes"
+  CXXFLAGS="$CXXFLAGS $tqt_includes"
   AC_TRY_LINK([extern "C" { void *(*__get_eh_context_ptr)();
                             void *__new_eh_context(void); }],
               [ __get_eh_context_ptr = &__new_eh_context;],