diff --git a/plot-gui-lib/plot/private/gui/plot2d.rkt b/plot-gui-lib/plot/private/gui/plot2d.rkt
index f163c533..9992d58d 100644
--- a/plot-gui-lib/plot/private/gui/plot2d.rkt
+++ b/plot-gui-lib/plot/private/gui/plot2d.rkt
@@ -89,7 +89,7 @@
     [(and title (not (or (string? title) (pict? title)))) (fail/kw "#f, string or pict" '#:title title)]
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)])
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)])
 
   (parameterize ([plot-title          title]
                  [plot-x-label        x-label]
@@ -160,7 +160,7 @@
     [(and title (not (or (string? title) (pict? title)))) (fail/kw "#f, string or pict" '#:title title)]
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)])
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)])
 
   ;; make-snip will be called in a separate thread, make sure the
   ;; parameters have the correct values in that thread as well.
@@ -186,7 +186,7 @@
           #:title (U String pict #f)
           #:x-label (U String pict #f)
           #:y-label (U String pict #f)
-          #:legend-anchor Anchor
+          #:legend-anchor Legend-Anchor
           #:out-file (U Path-String Output-Port #f)
           #:out-kind (U 'auto Image-File-Format)
           #:fgcolor Plot-Color
@@ -226,7 +226,7 @@
     [(and title (not (or (string? title) (pict? title)))) (fail/kw "#f, string or pict" '#:title title)]
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)]
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)]
     [(and out-kind (not (plot-file-format/c out-kind))) (fail/kw "plot-file-format/c" '#:out-kind out-kind)]
     [(not (plot-file-format/c out-kind)) (fail/kw "plot-file-format/c" '#:out-kind out-kind)]
     [(and fgcolor (not (plot-color/c fgcolor))) (fail/kw "plot-color/c" '#:fgcolor fgcolor)]
diff --git a/plot-gui-lib/plot/private/gui/plot3d.rkt b/plot-gui-lib/plot/private/gui/plot3d.rkt
index 960fd568..ee495ab8 100644
--- a/plot-gui-lib/plot/private/gui/plot3d.rkt
+++ b/plot-gui-lib/plot/private/gui/plot3d.rkt
@@ -76,7 +76,7 @@
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
     [(and z-label (not (or (string? z-label) (pict? z-label)))) (fail/kw "#f, string or pict" '#:y-label z-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)])
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)])
 
   (parameterize ([plot-title          title]
                  [plot-x-label        x-label]
@@ -177,7 +177,7 @@
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
     [(and z-label (not (or (string? z-label) (pict? z-label)))) (fail/kw "#f, string or pict" '#:y-label z-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)])
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)])
 
   ;; make-snip will be called in a separate thread, make sure the
   ;; parameters have the correct values in that thread as well.
@@ -208,7 +208,7 @@
           #:x-label (U String pict #f)
           #:y-label (U String pict #f)
           #:z-label (U String pict #f)
-          #:legend-anchor Anchor
+          #:legend-anchor Legend-Anchor
           #:out-file (U Path-String Output-Port #f)
           #:out-kind (U 'auto Image-File-Format)
           #:fgcolor Plot-Color
@@ -264,7 +264,7 @@
     [(and x-label (not (or (string? x-label) (pict? x-label)))) (fail/kw "#f, string or pict" '#:x-label x-label)]
     [(and y-label (not (or (string? y-label) (pict? y-label)))) (fail/kw "#f, string or pict" '#:y-label y-label)]
     [(and z-label (not (or (string? z-label) (pict? z-label)))) (fail/kw "#f, string or pict" '#:y-label z-label)]
-    [(not (anchor/c legend-anchor)) (fail/kw "anchor/c" '#:legend-anchor legend-anchor)]
+    [(not (anchor/c legend-anchor)) (fail/kw "legend-anchor/c" '#:legend-anchor legend-anchor)]
     [(and out-kind (not (plot-file-format/c out-kind))) (fail/kw "plot-file-format/c" '#:out-kind out-kind)]
     [(not (plot-file-format/c out-kind)) (fail/kw "plot-file-format/c" '#:out-kind out-kind)]
     [(and fgcolor (not (plot-color/c fgcolor))) (fail/kw "plot-color/c" '#:fgcolor fgcolor)]