diff --git a/Applications/Terminal/Terminal.cpp b/Applications/Terminal/Terminal.cpp
index bbd445f47c..41bb8b980f 100644
--- a/Applications/Terminal/Terminal.cpp
+++ b/Applications/Terminal/Terminal.cpp
@@ -930,11 +930,11 @@ void Terminal::set_size(u16 columns, u16 rows)
         while (m_lines.size() < rows)
             m_lines.append(make<Line>(columns));
     } else {
-        m_lines.resize(rows);
+        m_lines.shrink(rows);
     }
 
     for (int i = 0; i < rows; ++i)
-        m_lines[i]->set_length(columns);
+        m_lines[i].set_length(columns);
 
     m_columns = columns;
     m_rows = rows;
diff --git a/Applications/Terminal/Terminal.h b/Applications/Terminal/Terminal.h
index 69e94a3c1c..efb5adda8e 100644
--- a/Applications/Terminal/Terminal.h
+++ b/Applications/Terminal/Terminal.h
@@ -1,14 +1,14 @@
 #pragma once
 
 #include <AK/AKString.h>
+#include <AK/NonnullOwnPtrVector.h>
 #include <AK/Types.h>
-#include <AK/Vector.h>
 #include <LibCore/CConfigFile.h>
 #include <LibCore/CNotifier.h>
 #include <LibCore/CTimer.h>
-#include <LibGUI/GFrame.h>
 #include <LibDraw/GraphicsBitmap.h>
 #include <LibDraw/Rect.h>
+#include <LibGUI/GFrame.h>
 
 class Font;
 
@@ -193,15 +193,15 @@ private:
     Line& line(size_t index)
     {
         ASSERT(index < m_rows);
-        return *m_lines[index];
+        return m_lines[index];
     }
     const Line& line(size_t index) const
     {
         ASSERT(index < m_rows);
-        return *m_lines[index];
+        return m_lines[index];
     }
 
-    Vector<OwnPtr<Line>> m_lines;
+    NonnullOwnPtrVector<Line> m_lines;
 
     BufferPosition m_selection_start;
     BufferPosition m_selection_end;