diff --git a/Source/CPack/cmCPackOSXX11Generator.cxx b/Source/CPack/cmCPackOSXX11Generator.cxx
index 2d4bb97ff..0e8cbc0a5 100644
--- a/Source/CPack/cmCPackOSXX11Generator.cxx
+++ b/Source/CPack/cmCPackOSXX11Generator.cxx
@@ -150,7 +150,7 @@ int cmCPackOSXX11Generator::PackageFiles()
   // since we get random dashboard failures with this one
   // try running it more than once
   int numTries = 4;
-  bool res;
+  bool res = false;
   while(numTries > 0)
     {
     res = cmSystemTools::RunSingleCommand(dmgCmd.str().c_str(), &output,
diff --git a/Source/CPack/cmCPackPackageMakerGenerator.cxx b/Source/CPack/cmCPackPackageMakerGenerator.cxx
index ef81da8fd..0c4b1a6f9 100644
--- a/Source/CPack/cmCPackPackageMakerGenerator.cxx
+++ b/Source/CPack/cmCPackPackageMakerGenerator.cxx
@@ -320,7 +320,7 @@ int cmCPackPackageMakerGenerator::PackageFiles()
   std::string output;
   int retVal = 1;
   int numTries = 4;
-  bool res;
+  bool res = false;
   while(numTries > 0)
     {
     res = cmSystemTools::RunSingleCommand(dmgCmd.str().c_str(), &output,