diff --git a/diffrax/_solver/align.py b/diffrax/_solver/align.py
index 806a8a8f..750469b6 100644
--- a/diffrax/_solver/align.py
+++ b/diffrax/_solver/align.py
@@ -15,6 +15,7 @@
     UnderdampedLangevinTuple,
     UnderdampedLangevinX,
 )
+from .base import AbstractAdaptiveSolver
 from .foster_langevin_srk import (
     AbstractCoeffs,
     AbstractFosterLangevinSRK,
@@ -44,7 +45,9 @@ def __init__(self, beta, a1, b1, aa, chh):
 _ErrorEstimate = UnderdampedLangevinTuple
 
 
-class ALIGN(AbstractFosterLangevinSRK[_ALIGNCoeffs, _ErrorEstimate]):
+class ALIGN(
+    AbstractFosterLangevinSRK[_ALIGNCoeffs, _ErrorEstimate], AbstractAdaptiveSolver
+):
     r"""The Adaptive Langevin via Interpolated Gradients and Noise method
     designed by James Foster. This is a second order solver for the
     Underdamped Langevin Diffusion, and accepts terms of the form
diff --git a/diffrax/_solver/spark.py b/diffrax/_solver/spark.py
index bfaa0323..dda948b9 100644
--- a/diffrax/_solver/spark.py
+++ b/diffrax/_solver/spark.py
@@ -3,7 +3,7 @@
 import equinox.internal as eqxi
 import numpy as np
 
-from .base import AbstractStratonovichSolver
+from .base import AbstractAdaptiveSolver, AbstractStratonovichSolver
 from .srk import AbstractSRK, GeneralCoeffs, StochasticButcherTableau
 
 
@@ -35,7 +35,7 @@
 )
 
 
-class SPaRK(AbstractSRK, AbstractStratonovichSolver):
+class SPaRK(AbstractSRK, AbstractStratonovichSolver, AbstractAdaptiveSolver):
     r"""The Splitting Path Runge-Kutta method.
 
     It uses three evaluations of the drift and diffusion per step, and has the following