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-rw-r--r--MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.h b/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.h
index b3f70136d8..73ea92b5a1 100644
--- a/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.h
+++ b/MdeModulePkg/Universal/RegularExpressionDxe/RegularExpressionDxe.h
@@ -26,7 +26,9 @@
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
+#ifndef ARRAY_SIZE
#define ARRAY_SIZE(Array) (sizeof(Array) / sizeof(*Array))
+#endif
/**
Checks if the input string matches to the regular expression pattern.