diff --git a/quaternionic/utilities.py b/quaternionic/utilities.py
index 1af6929..56108ac 100644
--- a/quaternionic/utilities.py
+++ b/quaternionic/utilities.py
@@ -4,6 +4,7 @@
 
 import sys
 import functools
+import numpy as np
 
 ufunc_attributes = [
     'nin', 'nout', 'nargs', 'ntypes', 'types', 'identity', 'signature',
@@ -69,7 +70,6 @@ def convert_numpy_ufunc_type_to_numba_ftylist(typelist):
         # 'e': numba.half,  # numba.half doesn't exist
         # 'f': numba.single,  # numba.single doesn't exist
         'f': numba.float32,  # probably closest
-        'd': numba.float_,
         # 'g': numba.longfloat,  # numba.longfloat doesn't exist
         'g': numba.double,  # probably closest
         # 'F': numba.csingle,  # numba.csingle doesn't exist
@@ -78,6 +78,10 @@ def convert_numpy_ufunc_type_to_numba_ftylist(typelist):
         'D': numba.complex128,  # probably closest
         # 'G': numba.clongfloat,  # numba.clongfloat doesn't exist
     }
+    try:  # This is broken on numpy >= 2.0
+        map_numpy_typecode_to_numba_type["d"] = numba.float_
+    except:
+        pass
 
     ftylist = []
     for types in typelist:
diff --git a/tests/test_utilities.py b/tests/test_utilities.py
index a988057..515c6fa 100644
--- a/tests/test_utilities.py
+++ b/tests/test_utilities.py
@@ -70,7 +70,7 @@ def f1(a, b, c):
 def test_types_to_ftylist():
     import numba
     types_to_ftylist = quaternionic.utilities.convert_numpy_ufunc_type_to_numba_ftylist
-    types = '?bhilqpBHILQPfdgF->D'
+    types = '?bhilqpBHILQPfgF->D'
     ftylist = numba.complex128(
         numba.boolean,
         numba.byte,
@@ -86,7 +86,6 @@ def test_types_to_ftylist():
         numba.ulonglong,
         numba.uintp,
         numba.float32,
-        numba.float_,
         numba.double,
         numba.complex64,
     )