diff --git a/R/guide-legend.R b/R/guide-legend.R
index 6378300c6d..0f8b90d127 100644
--- a/R/guide-legend.R
+++ b/R/guide-legend.R
@@ -89,6 +89,12 @@
 #' # override.aes overwrites the alpha
 #' p3 + guides(colour = guide_legend(override.aes = list(alpha = 1)))
 #'
+#' # omit legend items
+#' p4 <- ggplot(mtcars, aes(wt, mpg, colour = factor(cyl))) +
+#'   geom_point()
+#' p4
+#' p4 + scale_color_discrete(breaks = c(4, 8))
+#'
 #' # multiple row/col legends
 #' df <- data.frame(x = 1:20, y = 1:20, color = letters[1:20])
 #' p <- ggplot(df, aes(x, y)) +
diff --git a/man/guide_legend.Rd b/man/guide_legend.Rd
index e56efb0aff..2001b171cf 100644
--- a/man/guide_legend.Rd
+++ b/man/guide_legend.Rd
@@ -114,6 +114,12 @@ p3
 # override.aes overwrites the alpha
 p3 + guides(colour = guide_legend(override.aes = list(alpha = 1)))
 
+# omit legend items
+p4 <- ggplot(mtcars, aes(wt, mpg, colour = factor(cyl))) +
+  geom_point()
+p4
+p4 + scale_color_discrete(breaks = c(4, 8))
+
 # multiple row/col legends
 df <- data.frame(x = 1:20, y = 1:20, color = letters[1:20])
 p <- ggplot(df, aes(x, y)) +