diff --git a/sane-backends.spec b/sane-backends.spec
index e747327..9879b69 100644
--- a/sane-backends.spec
+++ b/sane-backends.spec
@@ -14,7 +14,7 @@
 Summary: Scanner access software
 Name: sane-backends
 Version: 1.0.31
-Release: 2%{?dist}
+Release: 3%{?dist}
 # lib/ is LGPLv2+, backends are GPLv2+ with exceptions
 # Tools are GPLv2+, docs are public domain
 # see LICENSE for details
@@ -37,6 +37,8 @@ Patch1: sane-backends-1.0.23-soname.patch
 Patch2: sane-backends-1.0.23-sane-config-multilib.patch
 # saned manpage incomplete and exists when saned is not installed (#1515762)
 Patch3: sane-backends-saned-manpage.patch
+# 1750899 - CANOSCAN N650U scanner device not correctly detected via USB
+Patch4: sane-plustek-add-1ms.patch
 
 URL: http://www.sane-project.org
 
@@ -155,6 +157,7 @@ access image acquisition devices available on the local host.
 %patch1 -p1 -b .soname
 %patch2 -p1 -b .sane-config-multilib
 %patch3 -p1 -b .saned-manpage
+%patch4 -p1 -b .sane-plustek-add-1ms
 
 %build
 CFLAGS="%optflags -fno-strict-aliasing"
@@ -428,6 +431,9 @@ exit 0
 %{_unitdir}/saned@.service
 
 %changelog
+* Fri Oct 09 2020 Zdenek Dohnal <zdohnal@redhat.com> - 1.0.31-3
+- 1750899 - CANOSCAN N650U scanner device not correctly detected via USB
+
 * Mon Sep 14 2020 Zdenek Dohnal <zdohnal@redhat.com> - 1.0.31-2
 - make the base package depend on sane-airscan instead of libsane-airscan lib
 
diff --git a/sane-plustek-add-1ms.patch b/sane-plustek-add-1ms.patch
new file mode 100644
index 0000000..f8068fc
--- /dev/null
+++ b/sane-plustek-add-1ms.patch
@@ -0,0 +1,19 @@
+diff --git a/backend/plustek-usbhw.c b/backend/plustek-usbhw.c
+index 05d3cc7..28cbd52 100644
+--- a/backend/plustek-usbhw.c
++++ b/backend/plustek-usbhw.c
+@@ -1451,6 +1451,14 @@ usb_ResetRegisters( Plustek_Device *dev )
+ 			 * CanoScan devices to work properly after power-up
+ 			 */
+ 			sanei_lm983x_write_byte( dev->fd, 0x5b, regs[0x5b] );
++
++			/* At least CanoScan N650U can have a problem with writing
++			 * to register 0x59 due XHCI USB controller is too
++			 * fast for him. Simulate EHCI USB controller's
++			 * behavior here - wait 1ms.
++			 */
++			usleep(1000);
++
+ 			sanei_lm983x_write_byte( dev->fd, 0x59, regs[0x59] );
+ 			sanei_lm983x_write_byte( dev->fd, 0x5a, regs[0x5a] );
+ 		} else {