diff --git a/plugins/astyle/astyle_stringiterator.cpp b/plugins/astyle/astyle_stringiterator.cpp
--- a/plugins/astyle/astyle_stringiterator.cpp
+++ b/plugins/astyle/astyle_stringiterator.cpp
@@ -74,7 +74,7 @@
 
 astyle::streamoff AStyleStringIterator::getPeekStart() const
 {
-   return m_peekStart;
+   return m_peekStart == -1 ? 0 : m_peekStart;
 }