diff --git a/Source/cmake.cxx b/Source/cmake.cxx
index 88aed1dd9..5256fd064 100644
--- a/Source/cmake.cxx
+++ b/Source/cmake.cxx
@@ -618,7 +618,7 @@ void cmake::SetArgs(const std::vector<std::string>& args)
     else if(arg.find("--debug-output",0) == 0)
       {
       std::cout << "Running with debug output on.\n";
-      this->DebugOutputOn();
+      this->SetDebugOutputOn(true);
       }
     else if(arg.find("-G",0) == 0)
       {
diff --git a/Source/cmake.h b/Source/cmake.h
index 3f0c59887..c1e9a728b 100644
--- a/Source/cmake.h
+++ b/Source/cmake.h
@@ -317,7 +317,7 @@ class cmake
 
   // Do we want debug output during the cmake run.
   bool GetDebugOutput() { return this->DebugOutput; }
-  void DebugOutputOn() { this->DebugOutput = true;}
+  void SetDebugOutputOn(bool b) { this->DebugOutput = b;}
 
   // Define a property
   void DefineProperty(const char *name, cmProperty::ScopeType scope,