diff --git a/rules/formatter_blank_line.go b/rules/formatter_blank_line.go
index 905ff13..b6ef257 100644
--- a/rules/formatter_blank_line.go
+++ b/rules/formatter_blank_line.go
@@ -127,7 +127,7 @@ func (r *FormatterBlankLineRule) checkFileEnd(runner tflint.Runner, name string,
 	totalLine := countLines(runes)
 	line := 0
 
-	for ; line < totalLine; line++ {
+	for ; line < len(runes); line++ {
 		if runes[len(runes)-line-1] != '\n' {
 			break
 		}
diff --git a/rules/formatter_blank_line_test.go b/rules/formatter_blank_line_test.go
index 209faf4..b93b492 100644
--- a/rules/formatter_blank_line_test.go
+++ b/rules/formatter_blank_line_test.go
@@ -113,6 +113,22 @@ resource "null_resource" "second" {
 				},
 			},
 		},
+		{
+			Name: "only blank line",
+			Content: `
+`,
+			Expected: helper.Issues{
+				{
+					Rule: NewFormatterBlankLineRule(),
+					Message: "too many blank lines at start of file",
+					Range: hcl.Range{
+						Filename: "resource.tf",
+						Start:    hcl.Pos{Line: 1, Column: 1},
+						End:      hcl.Pos{Line: 2, Column: 1},
+					},
+				},
+			},
+		},
 	}
 
 	rule := NewFormatterBlankLineRule()