diff --git a/docs/basic_usage.rst b/docs/basic_usage.rst
index 0fefee9..98fb916 100644
--- a/docs/basic_usage.rst
+++ b/docs/basic_usage.rst
@@ -68,7 +68,7 @@ to resolve target identities.
    epoch = [2452709.5660, 2450638.5964, 2450570.7753, 2453184.5245]
    pol = [-1.63, -1.25, -1.14, -0.65]
 
-   pc = PhaseCurve(mag=mag, epoch=epoch, target="barbara")
+   pc = PhaseCurve(pol=pol, epoch=epoch, target="barbara")
    pc.get_ephems()