diff --git a/R/geom-text-repel.R b/R/geom-text-repel.R
index ed013e8..a5a57d0 100644
--- a/R/geom-text-repel.R
+++ b/R/geom-text-repel.R
@@ -69,7 +69,7 @@
 #'   \code{unit(0, "lines")}.
 #' @param segment.size Width of line segment connecting the data point to
 #'   the text label, in mm.
-#' @param segment.alpha Transparency of the segment, in \code[0,1]. Makes segments half transparent by default.
+#' @param segment.alpha Transparency of the segment, in \code{[0,1]}. Makes segments half transparent by default.
 #' @param arrow specification for arrow heads, as created by \code{\link[grid]{arrow}}
 #' @param force Force of repulsion between overlapping text labels. Defaults
 #'   to 1.
diff --git a/man/geom_text_repel.Rd b/man/geom_text_repel.Rd
index 1f62458..b05c067 100644
--- a/man/geom_text_repel.Rd
+++ b/man/geom_text_repel.Rd
@@ -85,7 +85,7 @@ rather than combining with them. This is most useful for helper functions
 that define both data and aesthetics and shouldn't inherit behaviour from
 the default plot specification, e.g. \code{\link[ggplot2]{borders}}.}
 
-\item{segment.alpha}{Transparency of the segment, in \code[0,1]. Makes segments half transparent by default.}
+\item{segment.alpha}{Transparency of the segment, in \code{[0,1]}. Makes segments half transparent by default.}
 }
 \description{
 \code{geom_text_repel} adds text directly to the plot.