diff --git a/R/data.R b/R/data.R
index 909c639b93..aee286cc57 100644
--- a/R/data.R
+++ b/R/data.R
@@ -100,7 +100,7 @@
 #'   \item{year}{year of manufacture}
 #'   \item{cyl}{number of cylinders}
 #'   \item{trans}{type of transmission}
-#'   \item{drv}{f = front-wheel drive, r = rear wheel drive, 4 = 4wd}
+#'   \item{drv}{the type of drive train, where f = front-wheel drive, r = rear wheel drive, 4 = 4wd}
 #'   \item{cty}{city miles per gallon}
 #'   \item{hwy}{highway miles per gallon}
 #'   \item{fl}{fuel type}
diff --git a/man/mpg.Rd b/man/mpg.Rd
index 598a59979f..63b4f8ca44 100644
--- a/man/mpg.Rd
+++ b/man/mpg.Rd
@@ -12,7 +12,7 @@
 \item{year}{year of manufacture}
 \item{cyl}{number of cylinders}
 \item{trans}{type of transmission}
-\item{drv}{f = front-wheel drive, r = rear wheel drive, 4 = 4wd}
+\item{drv}{the type of drive train, where f = front-wheel drive, r = rear wheel drive, 4 = 4wd}
 \item{cty}{city miles per gallon}
 \item{hwy}{highway miles per gallon}
 \item{fl}{fuel type}