diff --git a/docs/getting-started/app-custom-theme.md b/docs/getting-started/app-custom-theme.md
index 7973a54ab6..862c3c0cb6 100644
--- a/docs/getting-started/app-custom-theme.md
+++ b/docs/getting-started/app-custom-theme.md
@@ -128,7 +128,7 @@ const themeOptions = createThemeOptions({
     tool: genPageTheme(['#123456','#123456'], shapes.round),
     service: genPageTheme(['#123456','#123456'], shapes.wave),
     website: genPageTheme(['#123456','#123456'], shapes.wave),
-    library: genPageTheme(['#123456','#123456'] shapes.wave),
+    library: genPageTheme(['#123456','#123456'], shapes.wave),
     other: genPageTheme(['#123456','#123456'], shapes.wave),
     app: genPageTheme(['#123456','#123456'], shapes.wave),
     apis: genPageTheme(['#123456','#123456'], shapes.wave),