1 files changed, 4 insertions, 0 deletions
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index fabfd35..870fd6f 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -3162,6 +3162,10 @@ const char *cmMakefile::GetProperty(const char* prop)
 const char *cmMakefile::GetProperty(const char* prop,
                                     cmProperty::ScopeType scope)
 {
+  if(!prop)
+    {
+    return 0;
+    }
   // watch for specific properties
   static std::string output;
   output = "";