diff --git a/examples/H5Part/read_core_vfd.c b/examples/H5Part/read_core_vfd.c
index 4ad44ff..e2aae96 100644
--- a/examples/H5Part/read_core_vfd.c
+++ b/examples/H5Part/read_core_vfd.c
@@ -39,7 +39,7 @@ main (
 
         // open file and create first step
         h5_prop_t prop = H5CreateFileProp ();
-        H5SetPropFileCoreVFD (prop);
+        H5SetPropFileCoreVFD (prop, 0);
         h5_file_t file = H5OpenFile (fname, H5_O_RDONLY, prop);
         H5SetStep (file, 0);
 
diff --git a/examples/H5Part/write_core_vfd.c b/examples/H5Part/write_core_vfd.c
index 6e879e1..f29c252 100644
--- a/examples/H5Part/write_core_vfd.c
+++ b/examples/H5Part/write_core_vfd.c
@@ -42,7 +42,7 @@ main (
 
         // open file and create first step
         h5_prop_t prop = H5CreateFileProp ();
-        H5SetPropFileCoreVFD (prop);
+        H5SetPropFileCoreVFD (prop, 0);
         h5_file_t file = H5OpenFile (fname, H5_O_WRONLY, prop);
         H5SetStep (file, 0);