diff --git a/data/30-vendor-alps.quirks b/data/30-vendor-alps.quirks
index ed2b1243..2f020d1e 100644
--- a/data/30-vendor-alps.quirks
+++ b/data/30-vendor-alps.quirks
@@ -1,5 +1,17 @@
 # Do not edit this file, it will be overwritten on update
 
+# ALPS firmware versions:
+# V1            = 0x100
+# V2            = 0x200
+# V3            = 0x300
+# V3_RUSHMORE   = 0x310
+# V4            = 0x400
+# V5            = 0x500
+# V6            = 0x600
+# V7            = 0x700 /* t3btl t4s */
+# V8            = 0x800 /* SS4btl SS4s */
+# V9            = 0x900 /* ss3btl */
+
 [ALPS Serial Touchpads]
 MatchUdevType=touchpad
 MatchBus=ps2