diff --git a/README.txt b/README.txt
index 00faf83..9e0954a 100644
--- a/README.txt
+++ b/README.txt
@@ -43,6 +43,7 @@ Pentablake (Blake 512 x5)
 Neoscrypt (FeatherCoin)
 Scrypt and Scrypt:N
 Scrypt-Jane (Chacha)
+Sibcoin (sib)
 Skein (Skein + SHA)
 Woodcoin (Double Skein)
 Vertcoin Lyra2RE
@@ -90,6 +91,7 @@ its command line interface and options.
                           scrypt:N    use to mine Scrypt-N (:10 for 2048 iterations)
                           scrypt-jane use to mine Chacha coins like Cache and Ultracoin
                           s3          use to mine 1coin
+                          sib         use to mine Sibcoin
                           skein       use to mine Skeincoin
                           skein2      use to mine Woodcoin
                           x11         use to mine DarkCoin
@@ -231,7 +233,8 @@ features.
 
 >>> RELEASE HISTORY <<<
 
-  Dec. 03th 2015  v1.7.1
+  Dec. 31th 2015  v1.7.1
+                  Implement sib algo (X11 + Russian Streebog-512/GOST)
                   Small bug fixes about device ids mapping (and vendor names)
 
   Nov. 06th 2015  v1.7
diff --git a/ccminer.vcxproj b/ccminer.vcxproj
index e6c8ebc..fe285bd 100644
--- a/ccminer.vcxproj
+++ b/ccminer.vcxproj
@@ -283,6 +283,7 @@
     <ClCompile Include="sph\shavite.c" />
     <ClCompile Include="sph\simd.c" />
     <ClCompile Include="sph\skein.c" />
+    <ClCompile Include="sph\streebog.c" />
     <ClCompile Include="sph\hamsi.c" />
     <ClCompile Include="sph\hamsi_helper.c" />
     <ClCompile Include="sph\whirlpool.c" />
@@ -335,6 +336,7 @@
     <ClInclude Include="sph\sph_shavite.h" />
     <ClInclude Include="sph\sph_simd.h" />
     <ClInclude Include="sph\sph_skein.h" />
+    <ClInclude Include="sph\sph_streebog.h" />
     <ClInclude Include="sph\sph_hamsi.h" />
     <ClInclude Include="sph\sph_types.h" />
     <ClInclude Include="sph\sph_whirlpool.h" />
@@ -479,11 +481,12 @@
     <CudaCompile Include="x11\cuda_x11_simd512.cu">
       <MaxRegCount>64</MaxRegCount>
     </CudaCompile>
+    <CudaCompile Include="x11\cuda_streebog.cu" />
     <CudaCompile Include="x11\c11.cu" />
     <CudaCompile Include="x11\fresh.cu" />
+    <CudaCompile Include="x11\sib.cu" />
     <CudaCompile Include="x11\s3.cu" />
-    <CudaCompile Include="x11\x11.cu">
-    </CudaCompile>
+    <CudaCompile Include="x11\x11.cu" />
     <CudaCompile Include="x13\cuda_x13_hamsi512.cu">
       <MaxRegCount>72</MaxRegCount>
     </CudaCompile>
@@ -527,4 +530,4 @@
   <Target Name="AfterClean">
     <Delete Files="@(FilesToCopy->'$(OutDir)%(Filename)%(Extension)')" TreatErrorsAsWarnings="true" />
   </Target>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/ccminer.vcxproj.filters b/ccminer.vcxproj.filters
index d427426..81c61ec 100644
--- a/ccminer.vcxproj.filters
+++ b/ccminer.vcxproj.filters
@@ -186,6 +186,9 @@
     <ClCompile Include="sph\sha2big.c">
       <Filter>Source Files\sph</Filter>
     </ClCompile>
+    <ClCompile Include="sph\streebog.c">
+      <Filter>Source Files\sph</Filter>
+    </ClCompile>
     <ClCompile Include="compat\winansi.c">
       <Filter>Source Files</Filter>
     </ClCompile>
@@ -353,6 +356,9 @@
     <ClInclude Include="sph\sph_shabal.h">
       <Filter>Header Files\sph</Filter>
     </ClInclude>
+    <ClInclude Include="sph\sph_streebog.h">
+      <Filter>Header Files\sph</Filter>
+    </ClInclude>
     <ClInclude Include="sph\sph_whirlpool.h">
       <Filter>Header Files\sph</Filter>
     </ClInclude>
@@ -604,6 +610,12 @@
     <CudaCompile Include="pentablake.cu">
       <Filter>Source Files\CUDA</Filter>
     </CudaCompile>
+    <CudaCompile Include="x11\sib.cu">
+      <Filter>Source Files\CUDA\x11</Filter>
+    </CudaCompile>
+    <CudaCompile Include="x11\cuda_streebog.cu">
+      <Filter>Source Files\CUDA\x11</Filter>
+    </CudaCompile>
     <CudaCompile Include="x11\s3.cu">
       <Filter>Source Files\CUDA\x11</Filter>
     </CudaCompile>
@@ -710,4 +722,4 @@
       <Filter>Ressources</Filter>
     </Text>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>