diff --git a/deps/v8/include/v8config.h b/deps/v8/include/v8config.h
index 714d8a6f057..6dfeb52b34b 100644
--- a/deps/v8/include/v8config.h
+++ b/deps/v8/include/v8config.h
@@ -674,6 +674,11 @@ V8 shared library set USING_V8_SHARED.
 #if __riscv_xlen == 64
 #define V8_TARGET_ARCH_RISCV64 1
 #endif
+#elif defined(__s390__)
+#define V8_TARGET_ARCH_S390 1
+#if defined(__s390x__)
+#define V8_TARGET_ARCH_S390X 1
+#endif
 #else
 #error Target architecture was not detected as supported by v8
 #endif
@@ -770,7 +775,7 @@ V8 shared library set USING_V8_SHARED.
 #else
 #define V8_TARGET_LITTLE_ENDIAN 1
 #endif
-#elif __BIG_ENDIAN__  // FOR PPCGR on AIX
+#elif defined(__BIG_ENDIAN__)  // FOR PPCGR on AIX
 #define V8_TARGET_BIG_ENDIAN 1
 #elif V8_TARGET_ARCH_PPC_LE
 #define V8_TARGET_LITTLE_ENDIAN 1