diff --git a/docs/G-Codes.md b/docs/G-Codes.md
index a82f1cc9..ea77ddd1 100644
--- a/docs/G-Codes.md
+++ b/docs/G-Codes.md
@@ -14,7 +14,9 @@ Klipper supports the following standard G-Code commands:
 - Set position: `G92 [X<pos>] [Y<pos>] [Z<pos>] [E<pos>]`
 - Set speed factor override percentage: `M220 S<percent>`
 - Set extrude factor override percentage: `M221 S<percent>`
-- Set acceleration: `M204 S<value>`
+- Set acceleration: `M204 S<value>` OR `M204 P<value> T<value>`
+  - Note: If S is not specified and both P and T are specified, then
+    the acceleration is set to the minimum of P and T.
 - Get extruder temperature: `M105`
 - Set extruder temperature: `M104 [T<index>] [S<temperature>]`
 - Set extruder temperature and wait: `M109 [T<index>] S<temperature>`