@@ -31,11 +31,11 @@
 	OFGZIPStreamOperatingSystemVM_CMS      =   4,
 	OFGZIPStreamOperatingSystemAtariTOS    =   5,
 	OFGZIPStreamOperatingSystemHPFS	       =   6,
 	OFGZIPStreamOperatingSystemMacintosh   =   7,
 	OFGZIPStreamOperatingSystemZSystem     =   8,
-	OFGZIPStreamOperatingSystemCP_M	       =   9,
+	OFGZIPStreamOperatingSystemCPM	       =   9,
 	OFGZIPStreamOperatingSystemTOPS20      =  10,
 	OFGZIPStreamOperatingSystemNTFS	       =  11,
 	OFGZIPStreamOperatingSystemQDO	       =  12,
 	OFGZIPStreamOperatingSystemAcornRISCOS =  13,
 	OFGZIPStreamOperatingSystemUnknown     = 255