diff --git a/PowerEditor/src/Parameters.cpp b/PowerEditor/src/Parameters.cpp
index 4f9f86c49..f2f5eea83 100644
--- a/PowerEditor/src/Parameters.cpp
+++ b/PowerEditor/src/Parameters.cpp
@@ -3170,7 +3170,14 @@ void NppParameters::feedUserKeywordList(TiXmlNode *node)
 				if (globalMappper().keywordIdMapper.find(keywordsName) != globalMappper().keywordIdMapper.end())
 				{
 					id = globalMappper().keywordIdMapper[keywordsName];
-					lstrcpy(_userLangArray[_nbUserLang - 1]->_keywordLists[id], kwl);
+					if (_tcslen(kwl) < max_char)
+					{
+						lstrcpy(_userLangArray[_nbUserLang - 1]->_keywordLists[id], kwl);
+					}
+					else
+					{
+						lstrcpy(_userLangArray[_nbUserLang - 1]->_keywordLists[id], TEXT("imported string too long, needs to be < max_char(30720)"));
+					}
 				}
 			}
 		}
diff --git a/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp b/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
index 7f5570d9d..269d99d60 100644
--- a/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
+++ b/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
@@ -720,7 +720,7 @@ void ScintillaEditView::setUserLexer(const TCHAR *userLangName)
 			bool inSingleQuote = false;
 			bool nonWSFound = false;
 			int index = 0;
-			for (size_t j=0, len = strlen(keyWords_char); j<len; ++j)
+			for (size_t j=0, len = strlen(keyWords_char); j<len && index < (max_char-1); ++j)
 			{
 				if (!inSingleQuote && keyWords_char[j] == '"')
 				{