  The high accuracy reached by solar limb observations, by helioseismic
measurements and by Standard Solar Models (SSMs) calculations suggests that
general relativity corrections are included when discussing the solar radius.
The Allen value (R$_{\odot}$ = 695.99 $\pm$ 0.07 Mm) has to be reduced by 1.5
Km. This correction, which is small as compared with present accuracy, should
be kept in mind for future more precise measurements and/or calculations.
