2 files changed, 9 insertions, 0 deletions
diff --git a/doc/manual/opt-common-syn.xml b/doc/manual/opt-common-syn.xml
index eadc45e3a9..0412fcb6ab 100644
--- a/doc/manual/opt-common-syn.xml
+++ b/doc/manual/opt-common-syn.xml
@@ -24,6 +24,7 @@
 <arg><option>--fallback</option></arg>
 <arg><option>--readonly-mode</option></arg>
 <arg><option>--log-type</option> <replaceable>type</replaceable></arg>
+<arg><option>--show-trace</option></arg>
 <sbr />
 
 </nop>
diff --git a/doc/manual/opt-common.xml b/doc/manual/opt-common.xml
index ac967e23d0..3be9f5dd5f 100644
--- a/doc/manual/opt-common.xml
+++ b/doc/manual/opt-common.xml
@@ -305,6 +305,14 @@
 </varlistentry>
 
 
+<varlistentry><term><option>--show-trace</option></term>
+  
+  <listitem><para>Causes Nix to print out a stack trace in case of Nix
+  expression evaluation errors.</para></listitem>
+  
+</varlistentry>
+
+
 </variablelist>