diff --git a/doc/pdfio.3 b/doc/pdfio.3
index ee4a2e1..1309adb 100644
--- a/doc/pdfio.3
+++ b/doc/pdfio.3
@@ -848,7 +848,7 @@ PDFIO_ENCRYPTION_AES_128
 .TP 5
 PDFIO_ENCRYPTION_AES_256
 .br
-256-bit AES encryption (PDF 2.0)
+256-bit AES encryption (PDF 2.0) 
 .TP 5
 PDFIO_ENCRYPTION_NONE
 .br
diff --git a/doc/pdfio.html b/doc/pdfio.html
index 2e389e3..1a5a117 100644
--- a/doc/pdfio.html
+++ b/doc/pdfio.html
@@ -3797,7 +3797,6 @@ typedef enum <a href="#pdfio_valtype_e">pdfio_valtype_e</a> pdfio_valtype_t;
 <h4 class="constants">Constants</h4>
 <table class="list"><tbody>
 <tr><th>PDFIO_ENCRYPTION_AES_128 </th><td class="description">128-bit AES encryption (PDF 1.6)</td></tr>
-<tr><th>PDFIO_ENCRYPTION_AES_256 </th><td class="description">256-bit AES encryption (PDF 2.0)</td></tr>
 <tr><th>PDFIO_ENCRYPTION_NONE </th><td class="description">No encryption</td></tr>
 <tr><th>PDFIO_ENCRYPTION_RC4_128 </th><td class="description">128-bit RC4 encryption (PDF 1.4)</td></tr>
 <tr><th>PDFIO_ENCRYPTION_RC4_40 </th><td class="description">40-bit RC4 encryption (PDF 1.3)</td></tr>
diff --git a/pdfio.h b/pdfio.h
index 7e02d03..17f9275 100644
--- a/pdfio.h
+++ b/pdfio.h
@@ -65,7 +65,7 @@ typedef enum pdfio_encryption_e		// PDF encryption modes
   PDFIO_ENCRYPTION_RC4_40,		// 40-bit RC4 encryption (PDF 1.3)
   PDFIO_ENCRYPTION_RC4_128,		// 128-bit RC4 encryption (PDF 1.4)
   PDFIO_ENCRYPTION_AES_128,		// 128-bit AES encryption (PDF 1.6)
-  PDFIO_ENCRYPTION_AES_256		// 256-bit AES encryption (PDF 2.0)
+  PDFIO_ENCRYPTION_AES_256		// 256-bit AES encryption (PDF 2.0) @exclude all@
 } pdfio_encryption_t;
 typedef enum pdfio_filter_e		// Compression/decompression filters for streams
 {