diff --git a/src/patternparser.cpp b/src/patternparser.cpp
index a507ef4..7d08f65 100644
--- a/src/patternparser.cpp
+++ b/src/patternparser.cpp
@@ -935,7 +935,7 @@ bool PatternParser::CreateTreeCheckProgramDirective(Item & item)
 {
 	const wchar_t * old_itext = itext;
 
-	if( PT::IsSubStringNoCasep(L"if", itext) )
+	if( PT::is_substr_nc(L"if", itext) )
 	{
 		itext += 2;
 		SkipWhite();
@@ -948,7 +948,7 @@ bool PatternParser::CreateTreeCheckProgramDirective(Item & item)
 		}
 	}
 
-	if( PT::IsSubStringNoCasep(L"while", itext) )
+	if( PT::is_substr_nc(L"while", itext) )
 	{
 		itext += 5;
 		SkipWhite();
@@ -1095,7 +1095,7 @@ void PatternParser::CreateTreeReadIf(Item & item)
 	{
 		SkipWhite();
 
-		if( PT::IsSubStringNoCasep(L"else", itext) )
+		if( PT::is_substr_nc(L"else", itext) )
 		{
 			itext += 4;
 			pitem = item.AddItem();