diff --git a/libsrc/interface/rw_cgns.cpp b/libsrc/interface/rw_cgns.cpp
index 096fbfdca..edf199cfd 100644
--- a/libsrc/interface/rw_cgns.cpp
+++ b/libsrc/interface/rw_cgns.cpp
@@ -6,6 +6,37 @@
 
 #include <cgnslib.h>
 
+//vcpkg builds cgns with scoped enumes. So the associcated types and values need to be correctly scoped.
+#define ElementType_t CGNS_ENUMT(ElementType_t)
+#define GridLocation_t CGNS_ENUMT(GridLocation_t)
+#define PointSetType_t CGNS_ENUMT(PointSetType_t)
+#define DataType_t CGNS_ENUMT(DataType_t)
+#define ZoneType_t CGNS_ENUMT(ZoneType_t)
+#define Unstructured CGNS_ENUMV(Unstructured)
+#define RealDouble CGNS_ENUMV(RealDouble)
+#define MIXED CGNS_ENUMV(MIXED)
+#define EdgeCenter CGNS_ENUMV(EdgeCenter)
+#define KFaceCenter CGNS_ENUMV(KFaceCenter)
+#define JFaceCenter CGNS_ENUMV(JFaceCenter)
+#define IFaceCenter CGNS_ENUMV(IFaceCenter)
+#define FaceCenter CGNS_ENUMV(FaceCenter)
+#define CellCenter CGNS_ENUMV(CellCenter)
+#define Vertex CGNS_ENUMV(Vertex)
+#define BAR_2 CGNS_ENUMV(BAR_2)
+#define BAR_3 CGNS_ENUMV(BAR_3)
+#define TRI_3 CGNS_ENUMV(TRI_3)
+#define TRI_6 CGNS_ENUMV(TRI_6)
+#define QUAD_4 CGNS_ENUMV(QUAD_4)
+#define QUAD_8 CGNS_ENUMV(QUAD_8)
+#define TETRA_4 CGNS_ENUMV(TETRA_4)
+#define TETRA_10 CGNS_ENUMV(TETRA_10)
+#define PYRA_5 CGNS_ENUMV(PYRA_5)
+#define PYRA_13 CGNS_ENUMV(PYRA_13)
+#define HEXA_8 CGNS_ENUMV(HEXA_8)
+#define HEXA_20 CGNS_ENUMV(HEXA_20)
+#define PENTA_6 CGNS_ENUMV(PENTA_6)
+#define PENTA_15 CGNS_ENUMV(PENTA_15)
+
 namespace netgen::cg
 {
   typedef ngcore::ClosedHashTable<ngcore::INT<3,size_t>, size_t> PointTable;
@@ -215,7 +246,7 @@ namespace netgen::cg
     if(codim==2) name += mesh.GetCD2Name(index);
 
     int ne = 0;
-    Array<int> data;
+    Array<cgsize_t> data;
 
     if(dim==3)
       for(const auto el : mesh.VolumeElements())
@@ -333,7 +364,7 @@ namespace netgen::cg
       ZoneType_t zone_type;
       int fn, base, zone;
       int first_index_1d, first_index_2d, first_index_3d;
-      int nv=0, ne_1d=0, ne_2d=0, ne_3d=0;
+      cgsize_t nv=0, ne_1d=0, ne_2d=0, ne_3d=0;
 
       Array<string> names_1d, names_2d, names_3d;
 
@@ -643,7 +674,7 @@ namespace netgen
       int n_vertices = 0;
       for (auto zi : Range(1, nzones+1))
       {
-        int size[3];
+        cgsize_t size[3];
         char name[100];
         cg_zone_read(fn,base,zi, name, size);
         n_vertices += size[0];