  In this article we calculate the 1-loop supersymmetric QCD (SQCD) corrections
to the decay $\tilde u_1\to c \tilde\chi^0_1$ in the MSSM with generic flavour
structure. This decay mode is phenomenologically important if the mass
difference between the lightest squark $\tilde u_1$ (which is assumed to be
mainly stop-like) and the neutralino LSP $\tilde \chi^0_1$ is smaller than the
top mass. In such a scenario $\tilde u_1\to t \tilde\chi^0_1$ is kinematically
not allowed and searches for $\tilde u_1\to W b \tilde\chi^0_1$ and $\tilde
u_1\to c \tilde\chi^0_1$ are performed. A large decay rate for $\tilde u_1\to c
\tilde\chi^0_1$ can weaken the LHC bounds from $\tilde u_1\to W b \chi^0_1$
which are usually obtained under the assumption ${\rm Br}[\tilde u_1\to W b
\chi^0_1]=100\%$. We find the SQCD corrections enhance $\Gamma[\tilde u_1\to c
\tilde\chi^0_1]$ by approximately 10\% if the flavour-violation originates from
bilinear terms. If flavour-violation originates from trilinear terms, the
effect can be $\pm 50\%$ or more, depending on the sign of $A^t$. We note that
connecting a theory of SUSY breaking to LHC observables, the shift from the
$\overline{\rm DR}$ to the on-shell mass is numerically very important for
light stop decays.
