diff --git a/docs/nmap.dtd b/docs/nmap.dtd
index 0420cf3c7..e0ebfaa8c 100644
--- a/docs/nmap.dtd
+++ b/docs/nmap.dtd
@@ -263,7 +263,6 @@
 <!ELEMENT tcpsequence	EMPTY >
 <!ATTLIST tcpsequence
 			index		%attr_numeric;	#REQUIRED
-			class		CDATA		#REQUIRED
 			difficulty	CDATA		#REQUIRED
 			values		CDATA		#REQUIRED
 >
diff --git a/docs/nmap.xsl b/docs/nmap.xsl
index 17bcf2bca..df72bbe0b 100644
--- a/docs/nmap.xsl
+++ b/docs/nmap.xsl
@@ -726,7 +726,6 @@
     <h3>tcpsequence</h3>
     <ul>
         <li>index: <xsl:value-of select="@index" /></li>
-        <li>class: <xsl:value-of select="@class" /></li>
         <li>difficulty: <xsl:value-of select="@difficulty" /></li>
         <li>values: <xsl:value-of select="@values" /></li>
     </ul>
diff --git a/global_structures.h b/global_structures.h
index fc1e1a174..8dba989b2 100644
--- a/global_structures.h
+++ b/global_structures.h
@@ -202,8 +202,6 @@ struct timeout_info {
 
 struct seq_info {
   int responses;
-  int seqclass; /* SEQ_* defines in nmap.h.  This should be removed when
-		 we remove osscan gen1 cruft. */
   int ts_seqclass; /* TS_SEQ_* defines in nmap.h */
   time_t uptime; /* time of latest system boot (or 0 if unknown ) */
   int ipid_seqclass; /* IPID_SEQ_* defines in nmap.h */
diff --git a/nmap.cc b/nmap.cc
index 975dfe17c..e9ca6bcee 100644
--- a/nmap.cc
+++ b/nmap.cc
@@ -2371,28 +2371,6 @@ const char *seqidx2difficultystr(unsigned long idx) {
   return  (idx < 3)? "Trivial joke" : (idx < 6)? "Easy" : (idx < 11)? "Medium" : (idx < 12)? "Formidable" : (idx < 16)? "Worthy challenge" : "Good luck!";
 }
 
-
-const char *seqclass2ascii(int seqclass) {
-  switch(seqclass) {
-  case SEQ_CONSTANT:
-    return "constant sequence number (!)";
-  case SEQ_64K:
-    return "64K rule";
-  case SEQ_TD:
-    return "trivial time dependency";
-  case SEQ_i800:
-    return "increments by 800";
-  case SEQ_RI:
-    return "random positive increments";
-  case SEQ_TR:
-    return "truly random";
-  case SEQ_UNKNOWN:
-    return "unknown class";
-  default:
-    return "ERROR, WTF?";
-  }
-}
-
 const char *ipidclass2ascii(int seqclass) {
   switch(seqclass) {
   case IPID_SEQ_CONSTANT:
diff --git a/nmap.h b/nmap.h
index b46df08a1..56c0256bd 100644
--- a/nmap.h
+++ b/nmap.h
@@ -358,15 +358,6 @@ void *realloc();
    wrapped. */
 #define FP_RESULT_WRAP_LINE_LEN 74
 
-/* TCP/IP ISN sequence prediction classes */
-#define SEQ_UNKNOWN 0
-#define SEQ_64K 1
-#define SEQ_TD 2
-#define SEQ_RI 4
-#define SEQ_TR 8
-#define SEQ_i800 16
-#define SEQ_CONSTANT 32
-
 /* TCP Timestamp Sequence */
 #define TS_SEQ_UNKNOWN 0
 #define TS_SEQ_ZERO 1 /* At least one of the timestamps we received back was 0 */
diff --git a/output.cc b/output.cc
index c46987008..ca206f892 100644
--- a/output.cc
+++ b/output.cc
@@ -1649,7 +1649,7 @@ void printosscanoutput(Target *currenths) {
       while(*p) p++;
     }
     
-    log_write(LOG_XML, "<tcpsequence index=\"%li\" class=\"%s\" difficulty=\"%s\" values=\"%s\" />\n", (long) currenths->seq.index, seqclass2ascii(currenths->seq.seqclass), seqidx2difficultystr(currenths->seq.index), numlst); 
+    log_write(LOG_XML, "<tcpsequence index=\"%li\" difficulty=\"%s\" values=\"%s\" />\n", (long) currenths->seq.index, seqidx2difficultystr(currenths->seq.index), numlst); 
     if (o.verbose)
       log_write(LOG_PLAIN,"%s", seqreport(&(currenths->seq)));