diff --git a/hwdb/70-libratbag-mouse.hwdb b/hwdb/70-libratbag-mouse.hwdb
index 3d201ac4..1b8f1583 100644
--- a/hwdb/70-libratbag-mouse.hwdb
+++ b/hwdb/70-libratbag-mouse.hwdb
@@ -108,11 +108,15 @@ mouse:usb:v046dpc24e:name:*:
  RATBAG_HIDPP10_DPI=0:8200@50
  RATBAG_HIDPP10_PROFILE=G500
 
-# G502 over USB
+# G502 Proteus Core over USB
 mouse:usb:v046dpc07d:name:*:
  RATBAG_DRIVER=hidpp20
  RATBAG_SVG=logitech-g502.svg
 
+# G502 Proteus Spectrum over USB
+mouse:usb:v046dpc332:name:*:
+ RATBAG_DRIVER=hidpp20
+
 # G700 over USB
 mouse:usb:v046dpc06b:name:*:
  RATBAG_DRIVER=hidpp10
diff --git a/src/hidpp20.c b/src/hidpp20.c
index 07c4a939..316e2e37 100644
--- a/src/hidpp20.c
+++ b/src/hidpp20.c
@@ -1290,7 +1290,7 @@ hidpp20_onboard_profiles_initialize(struct hidpp20_device *device,
 	profiles->num_buttons = msg.msg.parameters[5] <= 16 ? msg.msg.parameters[5] : 16;
 	profiles->num_modes = HIDPP20_DPI_COUNT;
 	profiles->has_g_shift = (info->mechanical_layout & 0x03) == 2;
-	profiles->has_dpi_shift = (info->mechanical_layout & 0x0c) == 2;
+	profiles->has_dpi_shift = ((info->mechanical_layout & 0x0c) >> 2) == 2;
 	switch(info->various_info & 0x07) {
 	case 1:
 		profiles->corded = 1;