diff --git a/aaaa/digital-filters-meh/README.md b/aaaa/digital-filters-meh/README.md
index 1400328..dcd5be0 100644
--- a/aaaa/digital-filters-meh/README.md
+++ b/aaaa/digital-filters-meh/README.md
@@ -44,7 +44,7 @@ if abs(v(2)*a) >  (pi/8)
 endif
 ```
 
-If this check is true (ie, there's >Π/8 radians of rotation error on the Y axis), we get the flag! So the challenge here is making the satellite think it's drifted when it hasn't, without making the Kalman filter angry. How can we do that?
+If this check is true (ie, there's >π/8 radians of rotation error on the Y axis), we get the flag! So the challenge here is making the satellite think it's drifted when it hasn't, without making the Kalman filter angry. How can we do that?
 
 
 The star filter observations are pulled right after the previous check, with the following code: