--- a/swig/IECServiceAdmin.i
+++ b/swig/IECServiceAdmin.i
@@ -11,7 +11,7 @@
 %apply MAPILIST {LPECSVRNAMELIST};
 %apply MAPILIST * {LPECSERVERLIST* OUTPUT};
 
-%typemap(in,numinputs=0) (bool *OUTPUT) (bool bBool = NULL) {
+%typemap(in,numinputs=0) (bool *OUTPUT) (bool bBool = 0) {
   $1 = &bBool;
 }
 %typemap(argout, fragment="SWIG_From_int") bool *OUTPUT{