diff --git a/R/calibration.R b/R/calibration.R
index a117a01..36d19ac 100644
--- a/R/calibration.R
+++ b/R/calibration.R
@@ -59,7 +59,7 @@ tempcal <- function(Tc,
 #' calibration
 #' \deqn{y = a \times 10^6 / T^2 + b}{y = a * 10^6 / T^2 + b} with \eqn{T} in Kelvin,
 #' is expressed as a function of \eqn{T_C} (in degrees Celsius):
-#' \deqn{T_C = \sqrt((a \times 10^6) / (y - b)) - 273.15}{T[C] = sqrt((a * 10^6) / (y - b)) - 273.15}
+#' \deqn{T_C = \sqrt{(a \times 10^6) / (y - b)} - 273.15}{T[C] = sqrt((a * 10^6) / (y - b)) - 273.15}
 #'
 #' Defaults to Bonifacie et al. 2017 \deqn{\Delta_47 = (0.0449 \pm 0.001 \times
 #' 10^6) / T^2 + (0.167 \pm 0.01)}
diff --git a/man/revcal.Rd b/man/revcal.Rd
index fe32e72..7b254eb 100644
--- a/man/revcal.Rd
+++ b/man/revcal.Rd
@@ -36,7 +36,7 @@ A clumped isotope temperature calibration in reversed form, where the
 calibration
 \deqn{y = a \times 10^6 / T^2 + b}{y = a * 10^6 / T^2 + b} with \eqn{T} in Kelvin,
 is expressed as a function of \eqn{T_C} (in degrees Celsius):
-\deqn{T_C = \sqrt((a \times 10^6) / (y - b)) - 273.15}{T[C] = sqrt((a * 10^6) / (y - b)) - 273.15}
+\deqn{T_C = \sqrt{(a \times 10^6) / (y - b)} - 273.15}{T[C] = sqrt((a * 10^6) / (y - b)) - 273.15}
 }
 \details{
 Defaults to Bonifacie et al. 2017 \deqn{\Delta_47 = (0.0449 \pm 0.001 \times