diff --git a/src/arith_uint256.h b/src/arith_uint256.h
index 3f4cc8c2b..e4c7575e2 100644
--- a/src/arith_uint256.h
+++ b/src/arith_uint256.h
@@ -64,14 +64,6 @@ public:
 
     explicit base_uint(const std::string& str);
 
-    bool operator!() const
-    {
-        for (int i = 0; i < WIDTH; i++)
-            if (pn[i] != 0)
-                return false;
-        return true;
-    }
-
     const base_uint operator~() const
     {
         base_uint ret;
diff --git a/src/test/arith_uint256_tests.cpp b/src/test/arith_uint256_tests.cpp
index 13ec19834..8644aea37 100644
--- a/src/test/arith_uint256_tests.cpp
+++ b/src/test/arith_uint256_tests.cpp
@@ -198,13 +198,6 @@ BOOST_AUTO_TEST_CASE( shifts ) { // "<<"  ">>"  "<<="  ">>="
 
 BOOST_AUTO_TEST_CASE( unaryOperators ) // !    ~    -
 {
-    BOOST_CHECK(!ZeroL);
-    BOOST_CHECK(!(!OneL));
-    for (unsigned int i = 0; i < 256; ++i)
-        BOOST_CHECK(!(!(OneL<<i)));
-    BOOST_CHECK(!(!R1L));
-    BOOST_CHECK(!(!MaxL));
-
     BOOST_CHECK(~ZeroL == MaxL);
 
     unsigned char TmpArray[32];