diff --git a/R/utilities.r b/R/utilities.r
index b99c949a75..ffd3381a65 100644
--- a/R/utilities.r
+++ b/R/utilities.r
@@ -227,7 +227,7 @@ expand_range4 <- function(limits, expand) {
 #'   scale_x_discrete(expand = expand_scale(add = 2))
 #'
 #' # Reproduce the default range expansion used
-#' # when the ‘expand’ argument is not specified
+#' # when the 'expand' argument is not specified
 #' ggplot(subset(diamonds, carat > 2), aes(cut, price)) +
 #'   geom_jitter() +
 #'   scale_x_discrete(expand = expand_scale(add = .6)) +
diff --git a/man/expand_scale.Rd b/man/expand_scale.Rd
index b82ec179f1..f7ddb6b770 100644
--- a/man/expand_scale.Rd
+++ b/man/expand_scale.Rd
@@ -38,7 +38,7 @@ ggplot(subset(diamonds, carat > 2), aes(cut, clarity)) +
   scale_x_discrete(expand = expand_scale(add = 2))
 
 # Reproduce the default range expansion used
-# when the ‘expand’ argument is not specified
+# when the 'expand' argument is not specified
 ggplot(subset(diamonds, carat > 2), aes(cut, price)) +
   geom_jitter() +
   scale_x_discrete(expand = expand_scale(add = .6)) +