diff --git a/doc/efun/m_indices b/doc/efun/m_indices
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+SYNOPSIS:
+	mixed *m_indices(mapping map)
+
+DESCRIPTION:
+	Return an array containing the indices of mapping 'map'.
+
+SEE ALSO:
+	mappingp(E), mkmapping(E), m_values(E), m_delete(E),
+	sizeof(E), widthof(E)