diff --git a/code/nel/src/misc/streamed_package_manager.cpp b/code/nel/src/misc/streamed_package_manager.cpp
index 8114da948..89e5724c3 100644
--- a/code/nel/src/misc/streamed_package_manager.cpp
+++ b/code/nel/src/misc/streamed_package_manager.cpp
@@ -27,6 +27,7 @@
 #include <nel/misc/streamed_package_manager.h>
 #include <nel/misc/file.h>
 #include <nel/misc/path.h>
+#include <nel/misc/sha1.h>
 
 namespace NLMISC {
 
@@ -242,6 +243,15 @@ bool CStreamedPackageManager::getFile(std::string &filePath, const std::string &
 			}
 		}
 
+		CHashKey outHash = outBuffer.size() ? getSHA1(&outBuffer[0], outBuffer.size()) : CHashKey();
+		if (!(outHash == entry->Hash))
+		{
+			std::string wantHashS = entry->Hash.toString();
+			std::string outHashS = outHash.toString();
+			nlwarning("Invalid SHA1 hash for file '%s', download has hash '%s'", wantHashS.c_str(), outHashS.c_str());
+			return false;
+		}
+
 		{
 			COFile outStream(unpackPath);
 			outStream.serialBuffer(&outBuffer[0], (uint)fileSize);