diff --git a/openmc/filter.py b/openmc/filter.py
index 9815572a3..8b0c84c7e 100644
--- a/openmc/filter.py
+++ b/openmc/filter.py
@@ -1992,8 +1992,9 @@ class EnergyFunctionFilter(Filter):
                              'log-log Tabulated1Ds are supported')
         out = cls(tab1d.x, tab1d.y)
 
+        # set interpolation type
         if tab1d.interpolation[0] == 2:
-            out.interpolation = 'linear-lienar'
+            out.interpolation = 'linear-linear'
         elif tab1d.interpolation[0] == 3:
             out.interpolation = 'linear-log'
         elif tab1d.interpolation[0] == 4: