diff --git a/scene/gui/text_edit.cpp b/scene/gui/text_edit.cpp
index f2f3bd1a5..4b9f0012e 100644
--- a/scene/gui/text_edit.cpp
+++ b/scene/gui/text_edit.cpp
@@ -6051,7 +6051,7 @@ int TextEdit::get_indent_level(int p_line) const {
 
 bool TextEdit::is_line_comment(int p_line) const {
 	// Checks to see if this line is the start of a comment.
-	// ERR_FAIL_INDEX_V(p_line, text.size(), false);
+	ERR_FAIL_INDEX_V(p_line, text.size(), true);
 
 	int line_length = text[p_line].size();
 	for (int i = 0; i < line_length - 1; i++) {