diff --git a/OvmfPkg/XenBusDxe/Helpers.c b/OvmfPkg/XenBusDxe/Helpers.c
new file mode 100644
index 0000000000..b22f9c5b0d
--- /dev/null
+++ b/OvmfPkg/XenBusDxe/Helpers.c
@@ -0,0 +1,9 @@
+#include "XenBusDxe.h"
+
+CHAR8*
+AsciiStrDup (
+  IN CONST CHAR8* Str
+  )
+{
+  return AllocateCopyPool (AsciiStrSize (Str), Str);
+}
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.h b/OvmfPkg/XenBusDxe/XenBusDxe.h
index d80c118acf..6be5c58d92 100644
--- a/OvmfPkg/XenBusDxe/XenBusDxe.h
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.h
@@ -116,4 +116,9 @@ TestAndClearBit (
   IN volatile VOID *Address
   );
 
+CHAR8*
+AsciiStrDup (
+  IN CONST CHAR8* Str
+  );
+
 #endif