diff --git a/doc_src/set.txt b/doc_src/set.txt
index eda46da9c..d41b514e4 100644
--- a/doc_src/set.txt
+++ b/doc_src/set.txt
@@ -3,6 +3,10 @@
 \subsection set-synopsis Synopsis
 <code>set [OPTIONS] [VARIABLE_NAME [VALUES...]]</code>
 
+or
+
+<code>set [OPTIONS] [VARIABLE_NAME[INDICES]... [VALUES...]]</code>
+
 The <code>set</code> builtin causes fish to assign the variable <code>VARIABLE_NAME</code> the values <code>VALUES...</code>.
 
 \subsection set-description Description
@@ -29,7 +33,9 @@ elements, it will become an array with zero elements.
 
 If the variable name is one or more array elements, such as
 <code>PATH[1 3 7]</code>, only those array elements specified will be
-changed.
+changed. When array indices are specified to set, multiple arguments
+may be used to specify additional indexes, e.g. <code>set PATH[1]
+PATH[4] /bin /sbin</code>.
 
 The set command requires all switch arguments to come before any
 non-switch arguments. For example, <code>set flags -l</code> will have