diff --git a/doc/plugin_development.md b/doc/plugin_development.md
index 4d0b5010a0290fb4acb7e490cf4ab4f1ca36d450..12faaf00071e0e946381656c987380a570799a11 100644
--- a/doc/plugin_development.md
+++ b/doc/plugin_development.md
@@ -41,7 +41,7 @@ def plugin_exec(app, main_window):
     """
     # Place your init code here
     pass
-```icons
+```
 
 ## Building your plugin