diff --git a/jni/NativeFormats/fbreader/src/formats/oeb/OEBBookReader.cpp b/jni/NativeFormats/fbreader/src/formats/oeb/OEBBookReader.cpp
index 53600f65d..0c6171ceb 100644
--- a/jni/NativeFormats/fbreader/src/formats/oeb/OEBBookReader.cpp
+++ b/jni/NativeFormats/fbreader/src/formats/oeb/OEBBookReader.cpp
@@ -189,8 +189,6 @@ void OEBBookReader::endElementHandler(const char *tag) {
 }
 
 bool OEBBookReader::readBook(const ZLFile &file) {
-	ZLLogger::Instance().registerClass("MARLIN");
-
 	const ZLFile epub = file.getContainerArchive();
 	epub.forceArchiveType(ZLFile::ZIP);
 	shared_ptr<ZLDir> epubDir = epub.directory();
diff --git a/jni/NativeFormats/fbreader/src/formats/xhtml/XHTMLReader.cpp b/jni/NativeFormats/fbreader/src/formats/xhtml/XHTMLReader.cpp
index fa8fec90c..18f262e7e 100644
--- a/jni/NativeFormats/fbreader/src/formats/xhtml/XHTMLReader.cpp
+++ b/jni/NativeFormats/fbreader/src/formats/xhtml/XHTMLReader.cpp
@@ -204,13 +204,13 @@ void XHTMLTagStyleAction::doAtEnd(XHTMLReader &reader) {
 void XHTMLTagLinkAction::doAtStart(XHTMLReader &reader, const char **xmlattributes) {
 	static const std::string REL = "stylesheet";
 	const char *rel = reader.attributeValue(xmlattributes, "rel");
-	if ((rel == 0) || (REL != rel)) {
+	if (rel == 0 || REL != rel) {
 		return;
 	}
 	static const std::string TYPE = "text/css";
 
 	const char *type = reader.attributeValue(xmlattributes, "type");
-	if ((type == 0) || (TYPE != type)) {
+	if (type == 0 || TYPE != type) {
 		return;
 	}
 
diff --git a/jni/NativeFormats/zlibrary/core/src/filesystem/ZLFile.cpp b/jni/NativeFormats/zlibrary/core/src/filesystem/ZLFile.cpp
index e95824df0..61ece819e 100644
--- a/jni/NativeFormats/zlibrary/core/src/filesystem/ZLFile.cpp
+++ b/jni/NativeFormats/zlibrary/core/src/filesystem/ZLFile.cpp
@@ -99,7 +99,6 @@ shared_ptr<ZLInputStream> ZLFile::envelopeCompressedStream(shared_ptr<ZLInputStr
 shared_ptr<ZLInputStream> ZLFile::inputStream(shared_ptr<EncryptionMap> encryptionMap) const {
 	shared_ptr<FileEncryptionInfo> encryptionInfo =
 		encryptionMap.isNull() ? 0 : encryptionMap->info(myPath);
-	ZLLogger::Instance().println("MARLIN", myPath + " :: " + (encryptionInfo.isNull() ? "not encrypted" : "encrypted"));
 	if (!encryptionInfo.isNull()) {
 		return 0;
 	}
diff --git a/jni/NativeFormats/zlibrary/core/src/filesystem/zip/ZLZDecompressor.cpp b/jni/NativeFormats/zlibrary/core/src/filesystem/zip/ZLZDecompressor.cpp
index 09939108c..c87adcc6a 100644
--- a/jni/NativeFormats/zlibrary/core/src/filesystem/zip/ZLZDecompressor.cpp
+++ b/jni/NativeFormats/zlibrary/core/src/filesystem/zip/ZLZDecompressor.cpp
@@ -45,7 +45,7 @@ ZLZDecompressor::~ZLZDecompressor() {
 }
 
 std::size_t ZLZDecompressor::decompress(ZLInputStream &stream, char *buffer, std::size_t maxSize) {
-	while ((myBuffer.length() < maxSize) && (myAvailableSize > 0)) {
+	while (myBuffer.length() < maxSize && myAvailableSize > 0) {
 		std::size_t size = std::min(myAvailableSize, (std::size_t)IN_BUFFER_SIZE);
 
 		myZStream->next_in = (Bytef*)myInBuffer;