diff --git a/src/epanet.c b/src/epanet.c
index 50618cc..8d72f4a 100644
--- a/src/epanet.c
+++ b/src/epanet.c
@@ -3169,6 +3169,9 @@ int DLLEXPORT EN_setlinknodes(EN_ProjectHandle ph, int index, int node1, int nod
     int type;
     EN_Project *p = (EN_Project*)ph;
     EN_Network *net = &p->network;
+
+    // Check that end and start nodes are not the same
+    if (node1 == node2) return set_error(p->error_handle, 222);
     
     // Check that nodes exist
     if (node1 < 0 || node1 > net->Nnodes) return set_error(p->error_handle, 203);
diff --git a/win_build/WinSDK/epanet2.def b/win_build/WinSDK/epanet2.def
index fd4d4a9..7935207 100644
--- a/win_build/WinSDK/epanet2.def
+++ b/win_build/WinSDK/epanet2.def
@@ -13,6 +13,7 @@ EXPORTS
     ENgetlinkid                   = _ENgetlinkid@8                      
     ENgetlinkindex                = _ENgetlinkindex@8                   
     ENgetlinknodes                = _ENgetlinknodes@12                  
+    ENsetlinknodes                = _ENsetlinknodes@12                  
     ENgetlinktype                 = _ENgetlinktype@8                    
     ENgetlinkvalue                = _ENgetlinkvalue@12                  
     ENgetnodeid                   = _ENgetnodeid@8