diff --git a/deps/unrar/rijndael.cpp b/deps/unrar/rijndael.cpp
index dd19750a3..89f287f0c 100644
--- a/deps/unrar/rijndael.cpp
+++ b/deps/unrar/rijndael.cpp
@@ -11,10 +11,11 @@
 #include <wmmintrin.h>
 #endif
 
-static byte S[256],S5[256],rcon[30];
-static byte T1[256][4],T2[256][4],T3[256][4],T4[256][4];
-static byte T5[256][4],T6[256][4],T7[256][4],T8[256][4];
-static byte U1[256][4],U2[256][4],U3[256][4],U4[256][4];
+// not thread-safe ?
+//static byte S[256],S5[256],rcon[30];
+//static byte T1[256][4],T2[256][4],T3[256][4],T4[256][4];
+//static byte T5[256][4],T6[256][4],T7[256][4],T8[256][4];
+//static byte U1[256][4],U2[256][4],U3[256][4],U4[256][4];
 
 
 inline void Xor128(void *dest,const void *arg1,const void *arg2)
diff --git a/deps/unrar/rijndael.hpp b/deps/unrar/rijndael.hpp
index 2144e02e5..33537d890 100644
--- a/deps/unrar/rijndael.hpp
+++ b/deps/unrar/rijndael.hpp
@@ -33,6 +33,11 @@ class Rijndael
     int      m_uRounds;
     byte     m_initVector[MAX_IV_SIZE];
     byte     m_expandedKey[_MAX_ROUNDS+1][4][4];
+
+    byte S[256],S5[256],rcon[30];
+    byte T1[256][4],T2[256][4],T3[256][4],T4[256][4];
+    byte T5[256][4],T6[256][4],T7[256][4],T8[256][4];
+    byte U1[256][4],U2[256][4],U3[256][4],U4[256][4];
   public:
     Rijndael();
     void Init(bool Encrypt,const byte *key,uint keyLen,const byte *initVector);