diff --git a/raster/r.out.vtk/writeascii.c b/raster/r.out.vtk/writeascii.c
index 27af75d4922..1a6297a4a91 100644
--- a/raster/r.out.vtk/writeascii.c
+++ b/raster/r.out.vtk/writeascii.c
@@ -76,7 +76,8 @@ write_vtk_normal_header(FILE * fp, struct Cell_head region, double elevation,
 
     /*Simple vtk ASCII header */
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    /* The header line describes the data. */
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET STRUCTURED_POINTS\n");	/*We are using the structured point dataset. */
 
@@ -109,7 +110,7 @@ void write_vtk_structured_elevation_header(FILE * fp, struct Cell_head region)
 
     /*Simple vtk ASCII header */
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET STRUCTURED_GRID\n");	/*We are using the structured grid dataset. */
     fprintf(fp, "DIMENSIONS %i %i %i\n", region.cols, region.rows, 1);
@@ -125,7 +126,7 @@ void write_vtk_polygonal_elevation_header(FILE * fp, struct Cell_head region)
 
     /*Simple vtk ASCII header */
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET POLYDATA\n");	/*We are using polydataset. */
     fprintf(fp, "POINTS %i float\n", region.cols * region.rows);
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_cells.ref b/raster3d/r3.out.vtk/test_volume_null_1_cells.ref
index 15332af9ccd..815133ecac2 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_cells.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_cells.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET STRUCTURED_POINTS
 DIMENSIONS 13 9 6
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_cells_elevation.ref b/raster3d/r3.out.vtk/test_volume_null_1_cells_elevation.ref
index eb03eba7d2b..a60329adb72 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_cells_elevation.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_cells_elevation.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET UNSTRUCTURED_GRID
 POINTS 3840 float
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_cells_rgb_vect.ref b/raster3d/r3.out.vtk/test_volume_null_1_cells_rgb_vect.ref
index 8695f74b811..b60c1e46734 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_cells_rgb_vect.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_cells_rgb_vect.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET STRUCTURED_POINTS
 DIMENSIONS 13 9 6
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_points.ref b/raster3d/r3.out.vtk/test_volume_null_1_points.ref
index 22442cbebcc..a22cb713cc9 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_points.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_points.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET STRUCTURED_POINTS
 DIMENSIONS 12 8 5
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_points_elevation.ref b/raster3d/r3.out.vtk/test_volume_null_1_points_elevation.ref
index b9e2da97096..41bd29af486 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_points_elevation.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_points_elevation.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET STRUCTURED_GRID
 DIMENSIONS 12 8 5
diff --git a/raster3d/r3.out.vtk/test_volume_null_1_points_rgb_vect.ref b/raster3d/r3.out.vtk/test_volume_null_1_points_rgb_vect.ref
index 948aa8de4bf..2612ce6ce37 100644
--- a/raster3d/r3.out.vtk/test_volume_null_1_points_rgb_vect.ref
+++ b/raster3d/r3.out.vtk/test_volume_null_1_points_rgb_vect.ref
@@ -1,5 +1,5 @@
 # vtk DataFile Version 3.0
-GRASS GIS 7 Export
+GRASS GIS Export
 ASCII
 DATASET STRUCTURED_POINTS
 DIMENSIONS 12 8 5
diff --git a/raster3d/r3.out.vtk/writeVTKHead.c b/raster3d/r3.out.vtk/writeVTKHead.c
index 4da457e0acd..167fc8c34eb 100644
--- a/raster3d/r3.out.vtk/writeVTKHead.c
+++ b/raster3d/r3.out.vtk/writeVTKHead.c
@@ -42,7 +42,8 @@ void write_vtk_structured_point_header(FILE * fp, char *vtkFile,
     /*Simple vtk ASCII header */
 
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    /* The header line describes the data. */
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET STRUCTURED_POINTS\n"); /*We are using the structured point dataset. */
 
@@ -95,7 +96,7 @@ void write_vtk_structured_grid_header(FILE * fp, char *vtkFile,
     G_debug(3,
             "write_vtk_structured_grid_header: Writing VTKStructuredGrid-Header");
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET STRUCTURED_GRID\n"); /*We are using the structured grid dataset. */
     fprintf(fp, "DIMENSIONS %i %i %i\n", region.cols, region.rows,
@@ -117,7 +118,7 @@ void write_vtk_unstructured_grid_header(FILE * fp, char *vtkFile,
     G_debug(3,
             "write_vtk_unstructured_grid_header: Writing VTKUnstructuredGrid-Header");
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 Export\n");
+    fprintf(fp, "GRASS GIS Export\n");
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET UNSTRUCTURED_GRID\n"); /*We are using the unstructured grid dataset. */
     /*Only cell data is available, because we creating a hexaeder/vtk-voxel for every voxel */
diff --git a/vector/v.out.vtk/head.c b/vector/v.out.vtk/head.c
index c55fd128bc7..06e82cb4bc6 100644
--- a/vector/v.out.vtk/head.c
+++ b/vector/v.out.vtk/head.c
@@ -26,7 +26,8 @@ int write_vtk_head(FILE * fp, struct Map_info *Map)
 {
     G_debug(3, _("writeVTKHeader: Writing VTK-Header"));
     fprintf(fp, "# vtk DataFile Version 3.0\n");
-    fprintf(fp, "GRASS GIS 7 vector map: %s\n", Map->name);
+    /* The header line describes the data. */
+    fprintf(fp, "GRASS GIS vector map: %s\n", Map->name);
     fprintf(fp, "ASCII\n");
     fprintf(fp, "DATASET POLYDATA\n");	/*We are using polydata. If Volume data is supported, uGrid should be used */
     return (0);