diff --git a/include/epanet2.h b/include/epanet2.h
index c73d69b..85e1170 100644
--- a/include/epanet2.h
+++ b/include/epanet2.h
@@ -1195,27 +1195,27 @@ extern "C" {
   int DLLEXPORT EN_getqualtype(EN_ProjectHandle ph, int *qualcode, int *tracenode);
   int DLLEXPORT EN_geterror(int errcode, char *errmsg, int maxLen);
 
-  int DLLEXPORT EN_getstatistic(EN_Project *p, int code, EN_API_FLOAT_TYPE* value);
-  int DLLEXPORT EN_getnodeindex(EN_Project *p, char *id, int *index);
-  int DLLEXPORT EN_getnodeid(EN_Project *p, int index, char *id);
-  int DLLEXPORT EN_getnodetype(EN_Project *p, int index, int *code);
-  int DLLEXPORT EN_getnodevalue(EN_Project *p, int index, int code, EN_API_FLOAT_TYPE *value);
-  int DLLEXPORT EN_getcoord(EN_Project *p, int index, EN_API_FLOAT_TYPE *x, EN_API_FLOAT_TYPE *y);
-  int DLLEXPORT EN_setcoord(EN_Project *p, int index, EN_API_FLOAT_TYPE x, EN_API_FLOAT_TYPE y);
-  int DLLEXPORT EN_getnumdemands(EN_Project *p, int nodeIndex, int *numDemands);
-  int DLLEXPORT EN_getbasedemand(EN_Project *p, int nodeIndex, int demandIndex, EN_API_FLOAT_TYPE *baseDemand);
-  int DLLEXPORT EN_getdemandpattern(EN_Project *p, int nodeIndex, int demandIndex, int *pattIndex);
-  int DLLEXPORT EN_getlinkindex(EN_Project *p, char *id, int *index);
-  int DLLEXPORT EN_getlinkid(EN_Project *p, int index, char *id);
-  int DLLEXPORT EN_getlinktype(EN_Project *p, int index, EN_LinkType *code);
-  int DLLEXPORT EN_setlinktype(EN_Project *p, char *id, EN_LinkType type);
-  int DLLEXPORT EN_getlinknodes(EN_Project *p, int index, int *node1, int *node2);
-  int DLLEXPORT EN_getlinkvalue(EN_Project *p, int index, EN_LinkProperty code, EN_API_FLOAT_TYPE *value);
-  int DLLEXPORT EN_getcurve(EN_Project *p, int curveIndex, char* id, int *nValues, EN_API_FLOAT_TYPE **xValues, EN_API_FLOAT_TYPE **yValues);
-  int DLLEXPORT EN_getheadcurveindex(EN_Project *p, int pumpIndex, int *curveIndex);
-  int DLLEXPORT EN_setheadcurveindex(EN_Project *p, int pumpIndex, int curveIndex);
-  int DLLEXPORT EN_getpumptype(EN_Project *p, int linkIndex, int *outType);
-  int DLLEXPORT EN_getcurvetype(EN_Project *p, int curveIndex, int *outType);
+  int DLLEXPORT EN_getstatistic(EN_ProjectHandle ph, int code, EN_API_FLOAT_TYPE* value);
+  int DLLEXPORT EN_getnodeindex(EN_ProjectHandle ph, char *id, int *index);
+  int DLLEXPORT EN_getnodeid(EN_ProjectHandle ph, int index, char *id);
+  int DLLEXPORT EN_getnodetype(EN_ProjectHandle ph, int index, int *code);
+  int DLLEXPORT EN_getnodevalue(EN_ProjectHandle ph, int index, int code, EN_API_FLOAT_TYPE *value);
+  int DLLEXPORT EN_getcoord(EN_ProjectHandle ph, int index, EN_API_FLOAT_TYPE *x, EN_API_FLOAT_TYPE *y);
+  int DLLEXPORT EN_setcoord(EN_ProjectHandle ph, int index, EN_API_FLOAT_TYPE x, EN_API_FLOAT_TYPE y);
+  int DLLEXPORT EN_getnumdemands(EN_ProjectHandle ph, int nodeIndex, int *numDemands);
+  int DLLEXPORT EN_getbasedemand(EN_ProjectHandle ph, int nodeIndex, int demandIndex, EN_API_FLOAT_TYPE *baseDemand);
+  int DLLEXPORT EN_getdemandpattern(EN_ProjectHandle ph, int nodeIndex, int demandIndex, int *pattIndex);
+  int DLLEXPORT EN_getlinkindex(EN_ProjectHandle ph, char *id, int *index);
+  int DLLEXPORT EN_getlinkid(EN_ProjectHandle ph, int index, char *id);
+  int DLLEXPORT EN_getlinktype(EN_ProjectHandle ph, int index, EN_LinkType *code);
+  int DLLEXPORT EN_setlinktype(EN_ProjectHandle ph, char *id, EN_LinkType type);
+  int DLLEXPORT EN_getlinknodes(EN_ProjectHandle ph, int index, int *node1, int *node2);
+  int DLLEXPORT EN_getlinkvalue(EN_ProjectHandle ph, int index, EN_LinkProperty code, EN_API_FLOAT_TYPE *value);
+  int DLLEXPORT EN_getcurve(EN_ProjectHandle ph, int curveIndex, char* id, int *nValues, EN_API_FLOAT_TYPE **xValues, EN_API_FLOAT_TYPE **yValues);
+  int DLLEXPORT EN_getheadcurveindex(EN_ProjectHandle ph, int pumpIndex, int *curveIndex);
+  int DLLEXPORT EN_setheadcurveindex(EN_ProjectHandle ph, int pumpIndex, int curveIndex);
+  int DLLEXPORT EN_getpumptype(EN_ProjectHandle ph, int linkIndex, int *outType);
+  int DLLEXPORT EN_getcurvetype(EN_ProjectHandle ph, int curveIndex, int *outType);
 
   int DLLEXPORT EN_getversion(int *version);
   int DLLEXPORT EN_setcontrol(EN_ProjectHandle ph, int cindex, int ctype, int lindex, EN_API_FLOAT_TYPE setting, int nindex, EN_API_FLOAT_TYPE level);