diff --git a/src/Mod/Fem/coding_conventions.md b/src/Mod/Fem/coding_conventions.md
index 54631bf853..3a4f992b29 100644
--- a/src/Mod/Fem/coding_conventions.md
+++ b/src/Mod/Fem/coding_conventions.md
@@ -65,3 +65,8 @@ Python style is preferred over Doxygen style
 ## C++
 ### Naming policy
 - CamelCase names
+
+### Code formatting
+- slashes
+    - Do not use to many slashes in a row. This could cause trouble with Doxygen.
+    - see [PR with comment] (https://github.com/FreeCAD/FreeCAD/pull/2757#discussion_r355218913)