diff --git a/clang/lib/StaticAnalyzer/Checkers/VirtualCallChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/VirtualCallChecker.cpp
index 5b60246..cf673de 100644
--- a/clang/lib/StaticAnalyzer/Checkers/VirtualCallChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/VirtualCallChecker.cpp
@@ -72,7 +72,6 @@
     }
 
     std::shared_ptr<PathDiagnosticPiece> VisitNode(const ExplodedNode *N,
-                                                   const ExplodedNode *PrevN,
                                                    BugReporterContext &BRC,
                                                    BugReport &BR) override;
   };
@@ -84,9 +83,8 @@
 
 std::shared_ptr<PathDiagnosticPiece>
 VirtualCallChecker::VirtualBugVisitor::VisitNode(const ExplodedNode *N,
-                                                 const ExplodedNode *PrevN,
                                                  BugReporterContext &BRC,
-                                                 BugReport &BR) {
+                                                 BugReport &) {
   // We need the last ctor/dtor which call the virtual function.
   // The visitor walks the ExplodedGraph backwards.
   if (Found)