diff --git a/docs/source/server-process.md b/docs/source/server-process.md
index 6ac2208d..1f59f335 100644
--- a/docs/source/server-process.md
+++ b/docs/source/server-process.md
@@ -123,7 +123,9 @@ the following keys:
    explicit entry.
 2. **icon_path**
    Full path to an svg icon that could be used with a launcher. Currently only used by the
-   JupyterLab launcher, when category is "Notebook" (default) or "Console".
+   JupyterLab launcher, when category is "Notebook" (default) or "Console". Only text-based icon
+   formats, such as SVG, are supported. Using binary-based formats like PNG or JPEG will
+   result in an empty icon being displayed in kernels.
 3. **title**
    Title to be used for the launcher entry. Defaults to the name of the server if missing.
 4. **path_info**