diff --git a/sumpy/expansion/multipole.py b/sumpy/expansion/multipole.py
index a5ac8e145493892bc9b51d787d558ebed28ba7f7..7a567cefee9f0f6ac1ab1dc9888793d5921e6288 100644
--- a/sumpy/expansion/multipole.py
+++ b/sumpy/expansion/multipole.py
@@ -93,7 +93,7 @@ class VolumeTaylorMultipoleExpansionBase(MultipoleExpansionBase):
         base_taker = kernel.get_derivative_taker(bvec, rscale, sac)
         # Following is a no-op, but AxisTargetDerivative.postprocess_at_target and
         # DirectionalTargetDerivative.postprocess_at_target only handles
-        # DifferentiatedExprDerivativeTaker and sympy expression, so we need to
+        # DifferentiatedExprDerivativeTaker and sympy expressions, so we need to
         # make the taker a DifferentitatedExprDerivativeTaker instance.
         base_taker = DifferentiatedExprDerivativeTaker(base_taker,
                 {tuple([0]*self.dim): 1})