diff --git a/src/modules/events/temperature_calibration/polyfit.hpp b/src/modules/events/temperature_calibration/polyfit.hpp
index 0761c848c2..38bb457e80 100644
--- a/src/modules/events/temperature_calibration/polyfit.hpp
+++ b/src/modules/events/temperature_calibration/polyfit.hpp
@@ -63,7 +63,7 @@ We can accumulate VTV and VTY recursively as they are of fixed size, where:
 VTV = transpose(V)*V =
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 |      n                      x0+x1+...+xm                   x0^2+x1^2+...+xm^3   ..........  x0^n+x1^n+...+xn^n             |
-|x0+x1+...+xn              x0^2+x1^2+...+xm^3                x0^3+x1^3+...+xm^3   ..........  x0^(n+1)+x1^(n+1)+...+xm^(n+1) |
+|x0+x1+...+xm              x0^2+x1^2+...+xm^3                x0^3+x1^3+...+xm^3   ..........  x0^(n+1)+x1^(n+1)+...+xm^(n+1) |
 |      .                            .                                  .                             .                       |
 |      .                            .                                  .                             .                       |
 |      .                            .                                  .                             .                       |