diff --git a/ext/SparseConnectivityTracerDataInterpolationsExt.jl b/ext/SparseConnectivityTracerDataInterpolationsExt.jl
index 2f668d1b..f6499f66 100644
--- a/ext/SparseConnectivityTracerDataInterpolationsExt.jl
+++ b/ext/SparseConnectivityTracerDataInterpolationsExt.jl
@@ -9,6 +9,7 @@ using FillArrays: Fill # from FillArrays.jl
 using DataInterpolations:
     AbstractInterpolation,
     LinearInterpolation,
+    SmoothedLinearInterpolation,
     QuadraticInterpolation,
     LagrangeInterpolation,
     AkimaInterpolation,
@@ -81,6 +82,7 @@ end
 for (I, is_der1_zero, is_der2_zero) in (
         (:ConstantInterpolation, true, true),
         (:LinearInterpolation, false, true),
+        (:SmoothedLinearInterpolation, false, false),
         (:QuadraticInterpolation, false, false),
         (:LagrangeInterpolation, false, false),
         (:AkimaInterpolation, false, false),