diff --git a/docs/user_manual/components.md b/docs/user_manual/components.md
index 5968351858..b7a91db43b 100644
--- a/docs/user_manual/components.md
+++ b/docs/user_manual/components.md
@@ -1291,8 +1291,10 @@ calculations, an active voltage regulator makes the connection node a voltage-co
 the regulated object remains specified by the load/generator input, while the reactive power is calculated so that the
 voltage magnitude at the node follows `u_ref`.
 
+```{warning}
 Voltage regulation is supported only by the [Newton-Raphson power flow](./calculations.md#newton-raphson-power-flow)
 method.
+```
 
 ```{note}
 If `q_min` and/or `q_max` are specified, the calculated reactive power is checked against these limits. If the required