diff --git a/Source/cmGlobalXCodeGenerator.cxx b/Source/cmGlobalXCodeGenerator.cxx
index f67b029b3..02a95fed1 100644
--- a/Source/cmGlobalXCodeGenerator.cxx
+++ b/Source/cmGlobalXCodeGenerator.cxx
@@ -3467,7 +3467,14 @@ void cmGlobalXCodeGenerator::AppendFlag(std::string& flags,
     {
     if(*c == '\'')
       {
-      flags += "\\\\'";
+      if (this->XcodeVersion >= 40)
+        {
+        flags += "'\\\\''";
+        }
+      else
+        {
+        flags += "\\\\'";
+        }
       }
     else if(*c == '\\')
       {