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-rw-r--r--doc/manual/installation/prerequisites-source.xml4
1 files changed, 4 insertions, 0 deletions
diff --git a/doc/manual/installation/prerequisites-source.xml b/doc/manual/installation/prerequisites-source.xml
index 49036d940bd4..c0065f133700 100644
--- a/doc/manual/installation/prerequisites-source.xml
+++ b/doc/manual/installation/prerequisites-source.xml
@@ -19,6 +19,10 @@
   it from <link
   xlink:href="http://www.freedesktop.org/wiki/Software/pkg-config"
   />.</para></listitem>
+  
+  <listitem><para>The OpenSSL library to calculate cryptographic hashes.
+  If your distribution does not provide it, you can get it from <link
+  xlink:href="https://www.openssl.org"/>.</para></listitem>
 
   <listitem><para>The bzip2 compressor program and the
   <literal>libbz2</literal> library.  Thus you must have bzip2