diff --git a/src/consensus/validation.h b/src/consensus/validation.h
--- a/src/consensus/validation.h
+++ b/src/consensus/validation.h
@@ -70,13 +70,6 @@
     bool IsValid() const { return mode == MODE_VALID; }
     bool IsInvalid() const { return mode == MODE_INVALID; }
     bool IsError() const { return mode == MODE_ERROR; }
-    bool IsInvalid(int &nDoSOut) const {
-        if (IsInvalid()) {
-            nDoSOut = nDoS;
-            return true;
-        }
-        return false;
-    }
 
     bool CorruptionPossible() const { return corruptionPossible; }
     void SetCorruptionPossible() { corruptionPossible = true; }
diff --git a/src/test/txvalidation_tests.cpp b/src/test/txvalidation_tests.cpp
--- a/src/test/txvalidation_tests.cpp
+++ b/src/test/txvalidation_tests.cpp
@@ -51,10 +51,6 @@
     // Check that the validation state reflects the unsuccesful attempt.
     BOOST_CHECK(state.IsInvalid());
     BOOST_CHECK_EQUAL(state.GetRejectReason(), "bad-tx-coinbase");
-
-    int nDoS;
-    BOOST_CHECK_EQUAL(state.IsInvalid(nDoS), true);
-    BOOST_CHECK_EQUAL(nDoS, 100);
 }
 
 BOOST_AUTO_TEST_SUITE_END()