diff --git a/src/textdialog.cpp b/src/textdialog.cpp
index 8ca2e3b..5c317af 100644
--- a/src/textdialog.cpp
+++ b/src/textdialog.cpp
@@ -80,7 +80,7 @@ void TextDialog::exec() {
 	const int fontHeight = gmenu2x->font->getLineSpacing();
 	unsigned int contentY, contentHeight;
 	tie(contentY, contentHeight) = gmenu2x->getContentArea();
-	const unsigned rowsPerPage = contentHeight / fontHeight;
+	const unsigned rowsPerPage = max(contentHeight / fontHeight, 1u);
 	const unsigned maxFirstRow =
 			text.size() < rowsPerPage ? 0 : text.size() - rowsPerPage;
 	contentY += (contentHeight % fontHeight) / 2;
diff --git a/src/textmanualdialog.cpp b/src/textmanualdialog.cpp
index 0632c0c..1b17a6c 100644
--- a/src/textmanualdialog.cpp
+++ b/src/textmanualdialog.cpp
@@ -92,7 +92,7 @@ void TextManualDialog::exec() {
 	ss >> spagecount;
 	string pageStatus;
 
-	const unsigned rowsPerPage = 180 / gmenu2x->font->getLineSpacing();
+	const unsigned rowsPerPage = max(180u / gmenu2x->font->getLineSpacing(), 1u);
 
 	unsigned page = 0, firstRow = 0;
 	bool close = false;