In this paper we consider Hausdorff locally solid Riesz spaces
(
L
,
τ
)
(L,\tau )
and we denote by
(
L
^
,
τ
^
)
(\hat L,\hat \tau )
the Hausdorff topological completion of
(
L
,
τ
)
(L,\tau )
. It is proved that
(
L
^
,
τ
^
)
(\hat L,\hat \tau )
is a Hausdorff locally solid Riesz space containing L as a Riesz subspace. We study the properties of
(
L
,
τ
)
(L,\tau )
which are inherited by
(
L
^
,
τ
^
)
(\hat L,\hat \tau )
.