diff --git a/NAMESPACE b/NAMESPACE
index 8fbd9f9..4e76205 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -2,6 +2,7 @@
 
 export("%>%")
 export(renderStreamgraph)
+export(sg_add_marker)
 export(sg_annotate)
 export(sg_axis_x)
 export(sg_axis_y)
diff --git a/R/marker.r b/R/marker.r
index e3b2386..90f58ef 100644
--- a/R/marker.r
+++ b/R/marker.r
@@ -11,9 +11,10 @@
 #' @param space space (in points) from the marker to place the label
 #' @param y vertical position
 #' @param color color of the label
-#' @param size font size#' @export
+#' @param size font size
 #' @param anchor how to justify the label (one of \code{start} [left],
 #'     \code{middle} [center] or \code{end} [right])
+#' @export
 sg_add_marker <- function(sg, x, label="", stroke_width=0.5, stroke="#7f7f7f", space=5,
                           y=0, color="#7f7f7f", size=12, anchor="start") {