diff --git a/src/gui/widget/textbox.cpp b/src/gui/widget/textbox.cpp
index 52222713b..bba0b0d63 100644
--- a/src/gui/widget/textbox.cpp
+++ b/src/gui/widget/textbox.cpp
@@ -341,11 +341,11 @@ void CTextBox::refreshTextLineArray(void)
 				//TRACE_1("     aktLine : %s\r\n",aktLine.c_str());
 				//TRACE_1("     aktWidth: %d aktWordWidth:%d\r\n",aktWidth,aktWordWidth);
 
-				if( m_cText[pos] == '\n' ||
+				if( ((pos < TextChars) && (m_cText[pos] == '\n')) ||
 						loop == false)
 				{
 					// current line ends with an carriage return, make new line
-					if (m_cText[pos] == '\n')
+					if ((pos < TextChars) && (m_cText[pos] == '\n'))
 						aktLine.erase(aktLine.size() - 1,1);
 					m_cLineArray.push_back(aktLine);
 					m_nNrOfLines++;