diff --git a/spec/getdns-0.373.tgz b/spec/getdns-0.373.tgz
deleted file mode 100644
index 2c9c88c0..00000000
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diff --git a/spec/getdns-0.374.tgz b/spec/getdns-0.374.tgz
new file mode 100644
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diff --git a/spec/getdns_core_only.h b/spec/getdns_core_only.h
index 30d64c84..a73170f7 100644
--- a/spec/getdns_core_only.h
+++ b/spec/getdns_core_only.h
@@ -1,4 +1,4 @@
-/* Created at 2014-01-14-14-53-09*/
+/* Created at 2014-01-14-15-20-05*/
 #ifndef GETDNS_H
 #define GETDNS_H
 
@@ -35,6 +35,8 @@
 #define GETDNS_RETURN_DNSSEC_WITH_STUB_DISALLOWED_TEXT "A query was made with a context that is using stub resolution and a DNSSEC extension specified."
 #define GETDNS_RETURN_MEMORY_ERROR 310
 #define GETDNS_RETURN_MEMORY_ERROR_TEXT "Unable to allocate the memory required."
+#define GETDNS_RETURN_INVALID_PARAMETER 311
+#define GETDNS_RETURN_INVALID_PARAMETER_TEXT "A required parameter had an invalid value."
 
 /* DNSSEC values */
 #define GETDNS_DNSSEC_SECURE 400
diff --git a/spec/index.html b/spec/index.html
index 0adf4ce9..dbcb4c7d 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -1109,6 +1109,8 @@ struct getdns_list;
 <p class=descrip>A query was made with a context that is using stub resolution and a DNSSEC extension specified.</p>
 <p class=define>GETDNS_RETURN_MEMORY_ERROR</p>
 <p class=descrip>Unable to allocate the memory required.</p>
+<p class=define>GETDNS_RETURN_INVALID_PARAMETER</p>
+<p class=descrip>A required parameter had an invalid value.</p>
 
 
 <h2>5.3 <a id="TypeList">Types of RDATA Returned in the API</a></h2>
@@ -2208,7 +2210,7 @@ The response dicts inherit the custom memory management functions and the value
 
 <h1>9. The Generated Files</h1>
 
-<p>There is <a href="getdns-0.373.tgz">a tarball</a> that includes the .h files,
+<p>There is <a href="getdns-0.374.tgz">a tarball</a> that includes the .h files,
 the examples, and so on. The examples all make, even though there is no API implementation, based
 on a pseudo-implementation in the tarball; see make-examples-PLATFORM.sh. Note that this currently builds fine
 on the Macintosh and Ubuntu; help is definitely appreciated on making the build process