diff --git a/scripts/gen-s-parser.py b/scripts/gen-s-parser.py
index 451430cc9d8..d0848622f9c 100755
--- a/scripts/gen-s-parser.py
+++ b/scripts/gen-s-parser.py
@@ -619,6 +619,7 @@
     ("string.const",         "makeStringConst(s)"),
     ("string.measure_wtf8",  "makeStringMeasure(s, StringMeasureWTF8)"),
     ("string.measure_wtf16", "makeStringMeasure(s, StringMeasureWTF16)"),
+    ("string.is_usv_sequence", "makeStringMeasure(s, StringMeasureIsUSV)"),
     ("string.encode_wtf8",   "makeStringEncode(s, StringEncodeWTF8)"),
     ("string.encode_wtf16",  "makeStringEncode(s, StringEncodeWTF16)"),
     ("string.concat",        "makeStringConcat(s)"),
diff --git a/src/gen-s-parser.inc b/src/gen-s-parser.inc
index 9c3fa90e4b3..7001cb10b0a 100644
--- a/src/gen-s-parser.inc
+++ b/src/gen-s-parser.inc
@@ -3159,6 +3159,9 @@ switch (op[0]) {
                   default: goto parse_error;
                 }
               }
+              case 'i':
+                if (strcmp(op, "string.is_usv_sequence") == 0) { return makeStringMeasure(s, StringMeasureIsUSV); }
+                goto parse_error;
               case 'm': {
                 switch (op[18]) {
                   case '1':
diff --git a/src/passes/Print.cpp b/src/passes/Print.cpp
index cf4e6c9e97b..ec9926a3028 100644
--- a/src/passes/Print.cpp
+++ b/src/passes/Print.cpp
@@ -2253,6 +2253,9 @@ struct PrintExpressionContents
       case StringMeasureWTF16:
         printMedium(o, "string.measure_wtf16");
         break;
+      case StringMeasureIsUSV:
+        printMedium(o, "string.is_usv_sequence");
+        break;
       default:
         WASM_UNREACHABLE("invalid string.measure*");
     }
diff --git a/src/wasm-binary.h b/src/wasm-binary.h
index f89391186a8..97f6bc24e02 100644
--- a/src/wasm-binary.h
+++ b/src/wasm-binary.h
@@ -1146,6 +1146,7 @@ enum ASTNodes {
   StringEncodeWTF16 = 0x87,
   StringConcat = 0x88,
   StringEq = 0x89,
+  StringIsUSV = 0x8a,
 };
 
 enum MemoryAccess {
diff --git a/src/wasm.h b/src/wasm.h
index 41eaf328af0..42de60a9894 100644
--- a/src/wasm.h
+++ b/src/wasm.h
@@ -594,6 +594,7 @@ enum StringMeasureOp {
   StringMeasureUTF8,
   StringMeasureWTF8,
   StringMeasureWTF16,
+  StringMeasureIsUSV,
 };
 
 enum StringEncodeOp {
diff --git a/src/wasm/wasm-binary.cpp b/src/wasm/wasm-binary.cpp
index ef564db6e14..0ae17f47cbd 100644
--- a/src/wasm/wasm-binary.cpp
+++ b/src/wasm/wasm-binary.cpp
@@ -7191,6 +7191,8 @@ bool WasmBinaryBuilder::maybeVisitStringMeasure(Expression*& out,
     }
   } else if (code == BinaryConsts::StringMeasureWTF16) {
     op = StringMeasureWTF16;
+  } else if (code == BinaryConsts::StringIsUSV) {
+    op = StringMeasureIsUSV;
   } else {
     return false;
   }
diff --git a/src/wasm/wasm-stack.cpp b/src/wasm/wasm-stack.cpp
index 9a5db2928df..e1b093b26aa 100644
--- a/src/wasm/wasm-stack.cpp
+++ b/src/wasm/wasm-stack.cpp
@@ -2276,6 +2276,9 @@ void BinaryInstWriter::visitStringMeasure(StringMeasure* curr) {
     case StringMeasureWTF16:
       o << U32LEB(BinaryConsts::StringMeasureWTF16);
       break;
+    case StringMeasureIsUSV:
+      o << U32LEB(BinaryConsts::StringIsUSV);
+      break;
     default:
       WASM_UNREACHABLE("invalid string.new*");
   }
diff --git a/test/lit/strings.wast b/test/lit/strings.wast
index 687de8e3dab..d1a9fd0535d 100644
--- a/test/lit/strings.wast
+++ b/test/lit/strings.wast
@@ -225,4 +225,23 @@
       )
     )
   )
+
+  ;; CHECK:      (func $string.is_usv_sequence (param $ref stringref)
+  ;; CHECK-NEXT:  (drop
+  ;; CHECK-NEXT:   (i32.eqz
+  ;; CHECK-NEXT:    (string.is_usv_sequence
+  ;; CHECK-NEXT:     (local.get $ref)
+  ;; CHECK-NEXT:    )
+  ;; CHECK-NEXT:   )
+  ;; CHECK-NEXT:  )
+  ;; CHECK-NEXT: )
+  (func $string.is_usv_sequence (param $ref stringref)
+    (drop
+      (i32.eqz ;; validate the output is i32
+        (string.is_usv_sequence
+          (local.get $ref)
+        )
+      )
+    )
+  )
 )