3 files changed, 3 insertions, 3 deletions
diff --git a/frontends/cocoa/bitmap.m b/frontends/cocoa/bitmap.m
index 554d5e0bf..089870e8a 100644
--- a/frontends/cocoa/bitmap.m
+++ b/frontends/cocoa/bitmap.m
@@ -242,7 +242,7 @@ static nserror bitmap_render(struct bitmap *bitmap, struct hlcache_handle *conte
 
     cocoa_bitmap_modified(bitmap);
 
-    return true;
+    return NSERROR_OK;
 }
 
 static struct gui_bitmap_table bitmap_table = {
diff --git a/frontends/cocoa/gui.m b/frontends/cocoa/gui.m
index 9c0ccac91..f564563f8 100644
--- a/frontends/cocoa/gui.m
+++ b/frontends/cocoa/gui.m
@@ -129,7 +129,7 @@ static bool gui_window_get_scroll(struct gui_window *g, int *sx, int *sy)
 static nserror gui_window_set_scroll(struct gui_window *g, const struct rect *rect)
 {
     [[(__bridge BrowserViewController *)g browserView] scrollPoint:cocoa_point(rect->x0, rect->y0)];
-    return 0;
+    return NSERROR_OK;
 }
 
 /**
diff --git a/frontends/cocoa/plotter.m b/frontends/cocoa/plotter.m
index f02f7727b..1e01a47b0 100644
--- a/frontends/cocoa/plotter.m
+++ b/frontends/cocoa/plotter.m
@@ -74,7 +74,7 @@ static void cocoa_plot_path_set_stroke_pattern(NSBezierPath *path, const plot_st
 static nserror plot_line(const struct redraw_context *ctx, const plot_style_t *pstyle, const struct rect *line)
 {
     if (pstyle->stroke_type == PLOT_OP_TYPE_NONE)
-        return true;
+        return NSERROR_OK;
 
     [NSGraphicsContext saveGraphicsState];
     [NSBezierPath clipRect:cocoa_plot_clip_rect];