diff --git a/src/wasm/wasm-constants.h b/src/wasm/wasm-constants.h
index 1d67759fc7..ccd4bd042a 100644
--- a/src/wasm/wasm-constants.h
+++ b/src/wasm/wasm-constants.h
@@ -50,10 +50,10 @@ enum ValueTypeCode : uint8_t {
   kRttCode = 0x68,
   kDataRefCode = 0x67,
   kArrayRefCode = 0x66,
-  kStringRefCode = 0x65,
-  kStringViewWtf8Code = 0x64,
-  kStringViewWtf16Code = 0x63,
-  kStringViewIterCode = 0x62,
+  kStringRefCode = 0x64,
+  kStringViewWtf8Code = 0x63,
+  kStringViewWtf16Code = 0x62,
+  kStringViewIterCode = 0x61,
 };
 
 // Binary encoding of type definitions.
diff --git a/test/mjsunit/wasm/wasm-module-builder.js b/test/mjsunit/wasm/wasm-module-builder.js
index 1d575f1ebe..a51a5d7e36 100644
--- a/test/mjsunit/wasm/wasm-module-builder.js
+++ b/test/mjsunit/wasm/wasm-module-builder.js
@@ -128,10 +128,10 @@ let kWasmEqRef = -0x13;
 let kWasmI31Ref = -0x16;
 let kWasmDataRef = -0x19;
 let kWasmArrayRef = -0x1a;
-let kWasmStringRef = -0x1b;
-let kWasmStringViewWtf8 = -0x1c;
-let kWasmStringViewWtf16 = -0x1d;
-let kWasmStringViewIter = -0x1e;
+let kWasmStringRef = -0x1c;
+let kWasmStringViewWtf8 = -0x1d;
+let kWasmStringViewWtf16 = -0x1e;
+let kWasmStringViewIter = -0x1f;
 
 // Use the positive-byte versions inside function bodies.
 let kLeb128Mask = 0x7f;