Index: /issm/trunk-jpl/src/m/inversions/marshallcostfunctions.py
===================================================================
--- /issm/trunk-jpl/src/m/inversions/marshallcostfunctions.py	(revision 26872)
+++ /issm/trunk-jpl/src/m/inversions/marshallcostfunctions.py	(revision 26873)
@@ -14,5 +14,5 @@
               505: 'ThicknessAcrossGradient'}
 
-    if type(cost_functions == int):
+    if type(cost_functions) == int:
         data = [cfDict[cost_functions]]
     else: