diff --git a/fs/spiffs/Kconfig b/fs/spiffs/Kconfig
index ed1624f64ec..e8e9372ec48 100644
--- a/fs/spiffs/Kconfig
+++ b/fs/spiffs/Kconfig
@@ -168,6 +168,8 @@ config SPIFFS_NAME_MAX
 		Object name maximum length. Note that this length include the zero
 		termination character, meaning maximum string of characters.
 
+		Note: This config affects the on-flash structure.
+
 config SPIFFS_COPYBUF_STACK
 	int "Max Stack Allocation"
 	default 64