diff --git a/lib/codegen/build.rs b/lib/codegen/build.rs
index 92770e9b16..7cb20c4a14 100644
--- a/lib/codegen/build.rs
+++ b/lib/codegen/build.rs
@@ -80,7 +80,7 @@ fn main() {
     // Now that the Python build process is complete, generate files that are
     // emitted by the `meta` crate.
     // ------------------------------------------------------------------------
-    if let Err(err) = meta::gen_types::generate("new_types.rs", &out_dir) {
+    if let Err(err) = meta::gen_types::generate("types.rs", &out_dir) {
         eprintln!("Error: {}", err);
         process::exit(1);
     }
diff --git a/lib/codegen/meta-python/build.py b/lib/codegen/meta-python/build.py
index 9d3d43f95d..b88653822c 100644
--- a/lib/codegen/meta-python/build.py
+++ b/lib/codegen/meta-python/build.py
@@ -5,7 +5,6 @@
 from __future__ import absolute_import
 import argparse
 import isa
-import gen_types
 import gen_instr
 import gen_settings
 import gen_build_deps
@@ -26,7 +25,6 @@ def main():
 
     isas = isa.all_isas()
 
-    gen_types.generate(out_dir)
     gen_instr.generate(isas, out_dir)
     gen_settings.generate(isas, out_dir)
     gen_encoding.generate(isas, out_dir)
diff --git a/lib/codegen/meta-python/gen_types.py b/lib/codegen/meta-python/gen_types.py
deleted file mode 100644
index 4199efa51f..0000000000
--- a/lib/codegen/meta-python/gen_types.py
+++ /dev/null
@@ -1,64 +0,0 @@
-"""
-Generate sources with type info.
-
-This generates a `types.rs` file which is included in
-`lib/codegen/ir/types.rs`. The file provides constant definitions for the most
-commonly used types, including all of the scalar types.
-
-This ensures that Python and Rust use the same type numbering.
-"""
-from __future__ import absolute_import
-import srcgen
-from cdsl.types import ValueType
-import base.types  # noqa
-
-try:
-    from typing import Iterable  # noqa
-except ImportError:
-    pass
-
-
-def emit_type(ty, fmt):
-    # type: (ValueType, srcgen.Formatter) -> None
-    """
-    Emit a constant definition of a single value type.
-    """
-    name = ty.name.upper()
-    fmt.doc_comment(ty.__doc__)
-    fmt.line(
-            'pub const {}: Type = Type({:#x});'
-            .format(name, ty.number))
-    fmt.line()
-
-
-def emit_vectors(bits, fmt):
-    # type: (int, srcgen.Formatter) -> None
-    """
-    Emit definition for all vector types with `bits` total size.
-    """
-    size = bits // 8
-    for ty in ValueType.all_lane_types:
-        mb = ty.membytes
-        if mb == 0 or mb >= size:
-            continue
-        emit_type(ty.by(size // mb), fmt)
-
-
-def emit_types(fmt):
-    # type: (srcgen.Formatter) -> None
-    for spec in ValueType.all_special_types:
-        emit_type(spec, fmt)
-    for ty in ValueType.all_lane_types:
-        emit_type(ty, fmt)
-    # Emit vector definitions for common SIMD sizes.
-    emit_vectors(64, fmt)
-    emit_vectors(128, fmt)
-    emit_vectors(256, fmt)
-    emit_vectors(512, fmt)
-
-
-def generate(out_dir):
-    # type: (str) -> None
-    fmt = srcgen.Formatter()
-    emit_types(fmt)
-    fmt.update_file('types.rs', out_dir)
diff --git a/lib/codegen/src/ir/types.rs b/lib/codegen/src/ir/types.rs
index e1dcf0d177..c7f6d12f23 100644
--- a/lib/codegen/src/ir/types.rs
+++ b/lib/codegen/src/ir/types.rs
@@ -30,7 +30,7 @@ const LANE_BASE: u8 = 0x70;
 /// Start of the 2-lane vector types.
 const VECTOR_BASE: u8 = LANE_BASE + 16;
 
-// Include code generated by `lib/codegen/meta-python/gen_types.py`. This file contains constant
+// Include code generated by `lib/codegen/meta/gen_types.rs`. This file contains constant
 // definitions for all the scalar types as well as common vector types for 64, 128, 256, and
 // 512-bit SIMD vectors.
 include!(concat!(env!("OUT_DIR"), "/types.rs"));