Index: generic/nsfError.c
===================================================================
diff -u -r9addecef4701fd68a81b54714a370a9de3eb25f3 -rffd5b8ff74134cc891b9715cf1dd949193065b61
--- generic/nsfError.c	(.../nsfError.c)	(revision 9addecef4701fd68a81b54714a370a9de3eb25f3)
+++ generic/nsfError.c	(.../nsfError.c)	(revision ffd5b8ff74134cc891b9715cf1dd949193065b61)
@@ -12,7 +12,7 @@
  */
 
 #include "nsfInt.h"
-Tcl_Obj *NsfParamDefsSyntax(Nsf_Param CONST *paramPtr);
+Tcl_Obj *NsfParamDefsSyntax(INTERP_DECL Nsf_Param CONST *paramPtr);
 
 /*
  *----------------------------------------------------------------------
@@ -208,7 +208,7 @@
 extern int
 NsfArgumentError(Tcl_Interp *interp, CONST char *errorMsg, Nsf_Param CONST *paramPtr,
               Tcl_Obj *cmdNameObj, Tcl_Obj *methodObj) {
-  Tcl_Obj *argStringObj = NsfParamDefsSyntax(paramPtr);
+  Tcl_Obj *argStringObj = NsfParamDefsSyntax(INTERP paramPtr);
 
   NsfObjWrongArgs(interp, errorMsg, cmdNameObj, methodObj, ObjStr(argStringObj));
   DECR_REF_COUNT2("paramDefsObj", argStringObj);