diff --git a/doc/manual/compiler.rst b/doc/manual/compiler.rst
index 102db3b03..9d550e7b0 100644
--- a/doc/manual/compiler.rst
+++ b/doc/manual/compiler.rst
@@ -34,25 +34,25 @@ The Python types correspond to ARTIQ type annotations as follows:
 | Python        | ARTIQ                   |
 +===============+=========================+
 | NoneType      | TNone                   |
-+-------------+---------------------------+
++---------------+-------------------------+
 | bool          | TBool                   |
-+-------------+---------------------------+
++---------------+-------------------------+
 | int           | TInt32 or TInt64        |
-+-------------+---------------------------+
++---------------+-------------------------+
 | float         | TFloat                  |
-+-------------+---------------------------+
++---------------+-------------------------+
 | str           | TStr                    |
-+-------------+---------------------------+
++---------------+-------------------------+
 | list of T     | TList(T)                |
-+-------------+---------------------------+
++---------------+-------------------------+
 | range         | TRange32, TRange64      |
-+-------------+---------------------------+
++---------------+-------------------------+
 | numpy.int32   | TInt32                  |
-+-------------+---------------------------+
++---------------+-------------------------+
 | numpy.int64   | TInt64                  |
-+-------------+---------------------------+
++---------------+-------------------------+
 | numpy.float64 | TFloat                  |
-+-------------+---------------------------+
++---------------+-------------------------+
 
 Pitfalls
 --------