diff --git a/src/cmd/compile/abi-internal.md b/src/cmd/compile/abi-internal.md
index f901e707be3..1ae3c2538ff 100644
--- a/src/cmd/compile/abi-internal.md
+++ b/src/cmd/compile/abi-internal.md
@@ -402,7 +402,7 @@ without corrupting arguments or results.
 Special-purpose registers are as follows:
 
 | Register | Call meaning | Return meaning | Body meaning |
-| --- | --- | --- |
+| --- | --- | --- | --- |
 | RSP | Stack pointer | Same | Same |
 | RBP | Frame pointer | Same | Same |
 | RDX | Closure context pointer | Scratch | Scratch |