diff --git a/doc/classes/GPUParticles2D.xml b/doc/classes/GPUParticles2D.xml
index 96232f4277b..41f7b02ca6c 100644
--- a/doc/classes/GPUParticles2D.xml
+++ b/doc/classes/GPUParticles2D.xml
@@ -38,6 +38,7 @@
 			<description>
 				Emits a single particle. Whether [param xform], [param velocity], [param color] and [param custom] are applied depends on the value of [param flags]. See [enum EmitFlags].
 				The default ParticleProcessMaterial will overwrite [param color] and use the contents of [param custom] as [code](rotation, age, animation, lifetime)[/code].
+				[b]Note:[/b] [method emit_particle] is only supported on the Forward+ and Mobile rendering methods, not Compatibility.
 			</description>
 		</method>
 		<method name="restart">
diff --git a/doc/classes/GPUParticles3D.xml b/doc/classes/GPUParticles3D.xml
index f5df857391c..89958ed2177 100644
--- a/doc/classes/GPUParticles3D.xml
+++ b/doc/classes/GPUParticles3D.xml
@@ -36,6 +36,7 @@
 			<description>
 				Emits a single particle. Whether [param xform], [param velocity], [param color] and [param custom] are applied depends on the value of [param flags]. See [enum EmitFlags].
 				The default ParticleProcessMaterial will overwrite [param color] and use the contents of [param custom] as [code](rotation, age, animation, lifetime)[/code].
+				[b]Note:[/b] [method emit_particle] is only supported on the Forward+ and Mobile rendering methods, not Compatibility.
 			</description>
 		</method>
 		<method name="get_draw_pass_mesh" qualifiers="const">