Index: trunk/ppSim/src/ppSim.h
===================================================================
--- trunk/ppSim/src/ppSim.h	(revision 23487)
+++ trunk/ppSim/src/ppSim.h	(revision 23836)
@@ -183,5 +183,5 @@
 char *ppSimTypeToString (ppSimType type);
 
-float ppSimGetZeroPoint (psMetadata *recipe, char *filter);
+float ppSimGetZeroPoint(psMetadata *recipe, const char *filter);
 
 bool ppSimMergeReadouts (pmConfig *config, pmFPAview *view);