diff --git a/contrib/murmurhash/include/murmurhash3.h b/contrib/murmurhash/include/murmurhash3.h
index 256da1ad9d..eb16425576 100644
--- a/contrib/murmurhash/include/murmurhash3.h
+++ b/contrib/murmurhash/include/murmurhash3.h
@@ -23,6 +23,10 @@ typedef unsigned __int64 uint64_t;
 
 #endif // !defined(_MSC_VER)
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 //-----------------------------------------------------------------------------
 
 void MurmurHash3_x86_32  ( const void * key, int len, uint32_t seed, void * out );
@@ -32,3 +36,7 @@ void MurmurHash3_x86_128 ( const void * key, int len, uint32_t seed, void * out
 void MurmurHash3_x64_128 ( const void * key, int len, uint32_t seed, void * out );
 
 //-----------------------------------------------------------------------------
+
+#ifdef __cplusplus
+}
+#endif