diff --git a/daemon/postprocess/ParRenamer.cpp b/daemon/postprocess/ParRenamer.cpp
index 1949104cd..a38f83d7b 100644
--- a/daemon/postprocess/ParRenamer.cpp
+++ b/daemon/postprocess/ParRenamer.cpp
@@ -135,8 +135,20 @@ void ParRenamer::LoadParFile(const char* parFilename)
 			continue;
 		}
 		std::string filename = Par2::DiskFile::TranslateFilename(sourceFile->GetDescriptionPacket()->FileName());
-		m_fileHashList.emplace_back(filename.c_str(), sourceFile->GetDescriptionPacket()->Hash16k().print().c_str());
-		RegisterParredFile(filename.c_str());
+		std::string hash = sourceFile->GetDescriptionPacket()->Hash16k().print();
+
+		bool exists = std::find_if(m_fileHashList.begin(), m_fileHashList.end(),
+			[&hash](FileHash& fileHash)
+			{
+				return !strcmp(fileHash.GetHash(), hash.c_str());
+			})
+			!= m_fileHashList.end();
+
+		if (!exists)
+		{
+			m_fileHashList.emplace_back(filename.c_str(), hash.c_str());
+			RegisterParredFile(filename.c_str());
+		}
 	}
 }
 
diff --git a/tests/postprocess/ParRenamerTest.cpp b/tests/postprocess/ParRenamerTest.cpp
index f2d57e349..9f5946208 100644
--- a/tests/postprocess/ParRenamerTest.cpp
+++ b/tests/postprocess/ParRenamerTest.cpp
@@ -88,3 +88,19 @@ TEST_CASE("Par-renamer: detecting missing", "[Par][ParRenamer][Slow][TestData]")
 	REQUIRE(parRenamer.GetRenamedCount() == 1);
 	REQUIRE(parRenamer.HasMissedFiles());
 }
+
+TEST_CASE("Par-renamer: rename dupe par", "[Par][ParRenamer][Slow][TestData]")
+{
+	Options::CmdOptList cmdOpts;
+	cmdOpts.push_back("ParRename=yes");
+	Options options(&cmdOpts, nullptr);
+
+	ParRenamerMock parRenamer;
+	FileSystem::MoveFile((TestUtil::WorkingDir() + "/testfile.dat").c_str(), (TestUtil::WorkingDir() + "/123456").c_str());
+	FileSystem::MoveFile((TestUtil::WorkingDir() + "/testfile.vol00+1.par2").c_str(), (TestUtil::WorkingDir() + "/testfile2.par2").c_str());
+	parRenamer.SetDetectMissing(true);
+	parRenamer.Execute();
+
+	REQUIRE(parRenamer.GetRenamedCount() == 1);
+	REQUIRE_FALSE(parRenamer.HasMissedFiles());
+}