diff --git a/backend/genesys.conf.in b/backend/genesys.conf.in
index 8268da35a..21506f646 100644
--- a/backend/genesys.conf.in
+++ b/backend/genesys.conf.in
@@ -43,7 +43,8 @@ usb 0x04a9 0x2214
 usb 0x04a9 0x1900
 
 # Canon 4400F
-usb 0x04a9 0x2228
+# Disabled to prevent possible physical damage due to overheating (#436)
+#usb 0x04a9 0x2228
 
 # Canon LiDE 100
 usb 0x04a9 0x1904
diff --git a/doc/descriptions/genesys.desc b/doc/descriptions/genesys.desc
index e809d4be4..33fe735f6 100644
--- a/doc/descriptions/genesys.desc
+++ b/doc/descriptions/genesys.desc
@@ -232,8 +232,8 @@
 :model "CanoScan 4400F"
 :interface "USB"
 :usbid "0x04a9" "0x2228"
-:status :complete
-:comment "300, 600, 1200 dpi resolutions are supported in flatbed mode; 1200, 2400, 4800 dpi resolutions are supported in transparency scanning mode"
+:status :untested
+:comment "Physical damage due to overheating reported.  Enable in genesys.conf at your own risk.  See https://gitlab.com/sane-project/backends/-/issues/436.  300, 600, 1200 dpi resolutions are supported in flatbed mode; 1200, 2400, 4800 dpi resolutions are supported in transparency scanning mode"
 
 :model "CanoScan 5600F"
 :interface "USB"