diff --git a/deps/unrar/hc_decompress_rar.cpp b/deps/unrar/hc_decompress_rar.cpp
index 7266c0877..36b91a172 100644
--- a/deps/unrar/hc_decompress_rar.cpp
+++ b/deps/unrar/hc_decompress_rar.cpp
@@ -47,6 +47,10 @@ extern "C" unsigned int hc_decompress_rar (unsigned char *Win, unsigned char *In
 
   Unp.DoUnpack (METHOD, SOLID); // sets output
 
+  unsigned int wfs = (unsigned int) Unp.GetWrittenFileSize();
+
+  if (wfs != UnpackSize) return 0;
+
   unsigned int crc32 = (unsigned int) DataIO.UnpHash.GetCRC32 ();
 
   return crc32;
diff --git a/deps/unrar/unpack.hpp b/deps/unrar/unpack.hpp
index 3e23cd320..ab6531f09 100644
--- a/deps/unrar/unpack.hpp
+++ b/deps/unrar/unpack.hpp
@@ -383,6 +383,7 @@ class Unpack:PackDef
     bool IsFileExtracted() {return(FileExtracted);}
     void SetDestSize(int64 DestSize) {DestUnpSize=DestSize;FileExtracted=false;}
     void SetSuspended(bool Suspended) {Unpack::Suspended=Suspended;}
+    int64 GetWrittenFileSize() {return(WrittenFileSize);}
 
 #ifdef RAR_SMP
     void SetThreads(uint Threads);
diff --git a/docs/changes.txt b/docs/changes.txt
index 283e3c0d4..4b110c23c 100644
--- a/docs/changes.txt
+++ b/docs/changes.txt
@@ -129,6 +129,7 @@
 - Metal Backend: added workaround to prevent 'Infinite Loop' bug when build kernels
 - Metal Backend: allow use of devices with Metal if runtime version is >= 200
 - Metal Backend: disable Metal devices only if at least one OpenCL device is active
+- Modules: Check UnpackSize to raise false positive with hc_decompress_rar
 - User Options: added --metal-compiler-runtime option
 - Hardware Monitor: avoid sprintf in src/ext_iokit.c
 - Help: show supported hash-modes only with -hh