Maxwell's correction led to the final version of the Maxwell-Ampere equation, which accounts for both current components:
\[
\oint \vec{B} \cdot d\vec{\ell} = \mu_0 \left( I_c + I_d \right) = \mu_0 I_c + \mu_0 \epsilon \frac{d\Phi_E}{dt}
\]
This unification explains how electromagnetic waves can self-propagate through a vacuum without needing a physical medium!