diff --git a/src/awkward/_reducers.py b/src/awkward/_reducers.py
index 5c413840d7..61aa6a7f32 100644
--- a/src/awkward/_reducers.py
+++ b/src/awkward/_reducers.py
@@ -129,6 +129,14 @@ class ArgMin(KernelReducer):
     preferred_dtype: Final = np.int64
     needs_position: Final = True
 
+    @classmethod
+    def _dtype_for_kernel(cls, dtype: DTypeLike) -> DTypeLike:
+        dtype = np.dtype(dtype)
+        if dtype == np.bool_:
+            return np.dtype(np.int8)
+        else:
+            return super()._dtype_for_kernel(dtype)
+
     def apply(
         self,
         array: ak.contents.NumpyArray,
@@ -183,6 +191,14 @@ class ArgMax(KernelReducer):
     preferred_dtype: Final = np.int64
     needs_position: Final = True
 
+    @classmethod
+    def _dtype_for_kernel(cls, dtype: DTypeLike) -> DTypeLike:
+        dtype = np.dtype(dtype)
+        if dtype == np.bool_:
+            return np.dtype(np.int8)
+        else:
+            return super()._dtype_for_kernel(dtype)
+
     def apply(
         self,
         array: ak.contents.NumpyArray,
diff --git a/tests/test_2934_argmin_argmax_bool.py b/tests/test_2934_argmin_argmax_bool.py
new file mode 100644
index 0000000000..e8dd3dab0c
--- /dev/null
+++ b/tests/test_2934_argmin_argmax_bool.py
@@ -0,0 +1,12 @@
+# BSD 3-Clause License; see https://github.com/scikit-hep/awkward/blob/main/LICENSE
+
+from __future__ import annotations
+
+import awkward as ak
+
+
+def test():
+    array = ak.Array([[True, False, True], [False, False, True, False], [True, False]])
+
+    assert ak.argmin(array, axis=1).tolist() == [1, 0, 1]
+    assert ak.argmax(array, axis=1).tolist() == [0, 2, 0]