1 files changed, 3 insertions, 0 deletions
diff --git a/cell.go b/cell.go
index 35060ab..9af93f6 100644
--- a/cell.go
+++ b/cell.go
@@ -450,6 +450,9 @@ func (f *File) SetCellDefault(sheet, axis, value string) error {
 // setCellDefault prepares cell type and string type cell value by a given
 // string.
 func setCellDefault(value string) (t string, v string) {
+	if ok, _ := isNumeric(value); !ok {
+		t = "str"
+	}
 	v = value
 	return
 }