diff --git a/SabreTools.Library/README.1ST b/SabreTools.Library/README.1ST
index fd02c228..03e90032 100644
--- a/SabreTools.Library/README.1ST
+++ b/SabreTools.Library/README.1ST
@@ -279,6 +279,7 @@ Options:
 		  sha512			- SHA512
 		  smdb, everdrive	- Everdrive SMDB
 		  sl, softwarelist	- MAME Software List XML
+		  spamsum			- SpamSum
 		  ssv				- Standardized Semicolon-Separated Value
 		  tsv				- Standardized Tab-Separated Value
 		  xml, logiqx		- Logiqx XML
@@ -651,6 +652,7 @@ Options:
 		  sha512			- SHA512
 		  smdb, everdrive	- Everdrive SMDB
 		  sl, softwarelist	- MAME Software List XML
+		  spamsum			- SpamSum
 		  ssv				- Standardized Semicolon-Separated Value
 		  tsv				- Standardized Tab-Separated Value
 		  xml, logiqx		- Logiqx XML
@@ -805,6 +807,7 @@ Options:
 		  sha512			- SHA512
 		  smdb, everdrive	- Everdrive SMDB
 		  sl, softwarelist	- MAME Software List XML
+		  spamsum			- SpamSum
 		  ssv				- Standardized Semicolon-Separated Value
 		  tsv				- Standardized Tab-Separated Value
 		  xml, logiqx		- Logiqx XML
diff --git a/SabreTools/Features/BaseFeature.cs b/SabreTools/Features/BaseFeature.cs
index 68a542b0..2a0bea37 100644
--- a/SabreTools/Features/BaseFeature.cs
+++ b/SabreTools/Features/BaseFeature.cs
@@ -1762,6 +1762,7 @@ Possible values are:
     sha512           - SHA512
     smdb, everdrive  - Everdrive SMDB
     sl, softwarelist - MAME Software List XML
+    spamsum          - SpamSum
     ssv              - Standardized Semicolon-Separated Value
     tsv              - Standardized Tab-Separated Value
     xml, logiqx      - Logiqx XML");