diff --git a/src/gtextutils/text_line_reader.cpp b/src/gtextutils/text_line_reader.cpp
index fede933..28299e5 100644
--- a/src/gtextutils/text_line_reader.cpp
+++ b/src/gtextutils/text_line_reader.cpp
@@ -44,6 +44,6 @@ bool TextLineReader::next_line()
 	if (input_stream.eof())
 		return false;
 
-	return input_stream ;
+	return static_cast<bool>(input_stream) ;
 }