diff --git a/Source/cmCacheManager.cxx b/Source/cmCacheManager.cxx
index 3eea333007..bd95354564 100644
--- a/Source/cmCacheManager.cxx
+++ b/Source/cmCacheManager.cxx
@@ -42,6 +42,12 @@ const char* cmCacheManagerTypes[] =
   0
 };
 
+cmCacheManager::cmCacheManager()
+{
+  this->CacheMajorVersion = 0;
+  this->CacheMinorVersion = 0;
+}
+
 const char* cmCacheManager::TypeToString(cmCacheManager::CacheEntryType type)
 {
   if ( type > 6 )
diff --git a/Source/cmCacheManager.h b/Source/cmCacheManager.h
index 4fa6ed0956..50cc873d25 100644
--- a/Source/cmCacheManager.h
+++ b/Source/cmCacheManager.h
@@ -30,6 +30,7 @@ class cmMarkAsAdvancedCommand;
 class cmCacheManager
 {
 public:
+  cmCacheManager();
   class CacheIterator;
   friend class cmCacheManager::CacheIterator;
   enum CacheEntryType{ BOOL=0, PATH, FILEPATH, STRING, INTERNAL,STATIC,