diff --git a/PKGBUILD.old b/PKGBUILD
index ca08fcb..7048c13 100644
--- a/PKGBUILD.old
+++ b/PKGBUILD
@@ -39,6 +39,12 @@ prepare() {
         -e '/^MODVERSION=/a INCS+=-I/usr/include/qt/QtGui/$(MODVERSION) -I/usr/include/qt/QtCore/$(MODVERSION)' \
         -i qt5-im/Makefile
 
+    # Patch to make gcin work in qt >= 5.9.x
+    # ref: <https://hyperrate.com/thread.php?tid=33785>
+      sed \
+          -e 's/org.qt-project.Qt.QPlatformInputContextFactoryInterface/&.5.1/' \
+          -i qt5-im/gcin-qt5.h.in
+
     # FS#45732
     patch -p1 -i ../qt-5.5.patch