diff --git a/CryptoPkg/Library/Include/CrtLibSupport.h b/CryptoPkg/Library/Include/CrtLibSupport.h
index a47befbb90..b1db70a269 100644
--- a/CryptoPkg/Library/Include/CrtLibSupport.h
+++ b/CryptoPkg/Library/Include/CrtLibSupport.h
@@ -79,6 +79,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #define EINVAL        22              /* Invalid argument */
 #define EAFNOSUPPORT  47              /* Address family not supported by protocol family */
 #define INT_MAX       0x7FFFFFFF      /* Maximum (signed) int value */
+#define INT_MIN       (-INT_MAX-1)    /* Minimum (signed) int value */
 #define LONG_MAX      0X7FFFFFFFL     /* max value for a long */
 #define LONG_MIN      (-LONG_MAX-1)   /* min value for a long */
 #define ULONG_MAX     0xFFFFFFFF      /* Maximum unsigned long value */