diff --git a/src/textdialog.cpp b/src/textdialog.cpp
index c4f1d19..093131d 100644
--- a/src/textdialog.cpp
+++ b/src/textdialog.cpp
@@ -144,7 +144,8 @@ void TextDialog::exec() {
 				if (firstRow + rowsPerPage*2 -1 < text->size()) {
 					firstRow += rowsPerPage-1;
 				} else {
-					firstRow = max(0ul, (unsigned long) (text->size() - rowsPerPage));
+					firstRow = text->size() < rowsPerPage ?
+						0 : text->size() - rowsPerPage;
 				}
 				break;
 			case InputManager::SETTINGS: