diff --git a/src/obidmscolumn_int.c b/src/obidmscolumn_int.c
index 25ef3c1..d0bd07c 100644
--- a/src/obidmscolumn_int.c
+++ b/src/obidmscolumn_int.c
@@ -27,19 +27,15 @@
 
 int obi_column_set_int(OBIDMS_column_p column, size_t line_nb, size_t element_idx, obiint_t value)
 {
-	// check if can write?
-	size_t nb_elements_per_line = -1;
-	nb_elements_per_line = (column->header)->nb_elements_per_line;
-	*(((obiint_t*) (column->data)) + (line_nb * nb_elements_per_line) + element_idx) = value;
+	// when/where check if can write?
+	*(((obiint_t*) (column->data)) + (line_nb * ((column->header)->nb_elements_per_line)) + element_idx) = value;
 	return 0;
 }
 
 
 obiint_t obi_column_get_int(OBIDMS_column_p column, size_t line_nb, size_t element_idx)
 {
-	size_t nb_elements_per_line = -1;
-	nb_elements_per_line = (column->header)->nb_elements_per_line;
-	return *(((obiint_t*) (column->data)) + (line_nb * nb_elements_per_line) + element_idx);
+	return *(((obiint_t*) (column->data)) + (line_nb * ((column->header)->nb_elements_per_line)) + element_idx);
 }