diff --git a/wolfcrypt/src/error.c b/wolfcrypt/src/error.c
index 066831feb..be37b7275 100644
--- a/wolfcrypt/src/error.c
+++ b/wolfcrypt/src/error.c
@@ -413,6 +413,9 @@ const char* wc_GetErrorString(int error)
     case WC_CLEANUP_E:
         return "wolfcrypt cleanup failed";
 
+    case ECC_CDH_KAT_FIPS_E:
+        return "wolfcrypt FIPS ECC CDH Known Answer Test Failure";
+
     default:
         return "unknown error number";
 
diff --git a/wolfssl/wolfcrypt/error-crypt.h b/wolfssl/wolfcrypt/error-crypt.h
index 9b8b731fe..8a5080d57 100644
--- a/wolfssl/wolfcrypt/error-crypt.h
+++ b/wolfssl/wolfcrypt/error-crypt.h
@@ -182,6 +182,7 @@ enum {
     BAD_KEYWRAP_ALG_E   = -239,
     BAD_KEYWRAP_IV_E    = -240,  /* Decrypted AES key wrap IV incorrect */
     WC_CLEANUP_E        = -241,  /* wolfcrypt cleanup failed */
+    ECC_CDH_KAT_FIPS_E  = -242,  /* ECC CDH Known Answer Test failure */
 
     MIN_CODE_E          = -300   /* errors -101 - -299 */