diff --git a/src/uPDFTypes.cpp b/src/uPDFTypes.cpp
index 60b12c3..ccd2dd0 100644
--- a/src/uPDFTypes.cpp
+++ b/src/uPDFTypes.cpp
@@ -107,7 +107,8 @@ namespace uPDFParser
 	const char* streamData = (const char*)data(); // Force reading if not in memory
 	res += std::string(streamData, _dataLength);
 	// Be sure there is a final line return
-	if (streamData[_dataLength-1] != '\n' &&
+	if (_dataLength &&
+	    streamData[_dataLength-1] != '\n' &&
 	    streamData[_dataLength-1] != '\r')
 	    res += "\n";
 	res += "endstream\n";