diff --git a/lib/io/dsv_io.cpp b/lib/io/dsv_io.cpp
index 44c1403..f587243 100644
--- a/lib/io/dsv_io.cpp
+++ b/lib/io/dsv_io.cpp
@@ -977,7 +977,7 @@ void gctl::geodsv_io::fill_column_point3dc(const array<point3dc> &data, int xid,
     {
         table_[i][xid].value(data[i - 1].x, p);
         table_[i][yid].value(data[i - 1].y, p);
-        table_[i][zid].value(data[i - 1].y, p);
+        table_[i][zid].value(data[i - 1].z, p);
     }
     return;
 }