diff --git a/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp b/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
index 28823598c2..d6aadca2bd 100644
--- a/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
@@ -354,9 +354,11 @@ Interpreter::ValueAndFrame Interpreter::run_and_return_frame(Executable& executa
     if (auto native_executable = executable.get_or_create_native_executable()) {
         native_executable->run(vm());
 
+#if 0
         for (size_t i = 0; i < vm().running_execution_context().local_variables.size(); ++i) {
             dbgln("%{}: {}", i, vm().running_execution_context().local_variables[i]);
         }
+#endif
 
     } else {
         run_bytecode();
diff --git a/Userland/Libraries/LibJS/JIT/Compiler.cpp b/Userland/Libraries/LibJS/JIT/Compiler.cpp
index fdd698d16c..f4eabf98ea 100644
--- a/Userland/Libraries/LibJS/JIT/Compiler.cpp
+++ b/Userland/Libraries/LibJS/JIT/Compiler.cpp
@@ -175,6 +175,22 @@ void Compiler::compile_increment(Bytecode::Op::Increment const&)
     check_exception();
 }
 
+static Value cxx_decrement(VM& vm, Value value)
+{
+    auto old_value = TRY_OR_SET_EXCEPTION(value.to_numeric(vm));
+    if (old_value.is_number())
+        return Value(old_value.as_double() - 1);
+    return BigInt::create(vm, old_value.as_bigint().big_integer().minus(Crypto::SignedBigInteger { 1 }));
+}
+
+void Compiler::compile_decrement(Bytecode::Op::Decrement const&)
+{
+    load_vm_register(ARG1, Bytecode::Register::accumulator());
+    m_assembler.native_call((void*)cxx_decrement);
+    store_vm_register(Bytecode::Register::accumulator(), RET);
+    check_exception();
+}
+
 void Compiler::check_exception()
 {
     // if (exception.is_empty()) goto no_exception;
@@ -474,6 +490,9 @@ OwnPtr<NativeExecutable> Compiler::compile(Bytecode::Executable& bytecode_execut
             case Bytecode::Instruction::Type::Increment:
                 compiler.compile_increment(static_cast<Bytecode::Op::Increment const&>(op));
                 break;
+            case Bytecode::Instruction::Type::Decrement:
+                compiler.compile_decrement(static_cast<Bytecode::Op::Decrement const&>(op));
+                break;
             case Bytecode::Instruction::Type::EnterUnwindContext:
                 compiler.compile_enter_unwind_context(static_cast<Bytecode::Op::EnterUnwindContext const&>(op));
                 break;
diff --git a/Userland/Libraries/LibJS/JIT/Compiler.h b/Userland/Libraries/LibJS/JIT/Compiler.h
index 78e502b444..8b189acbb0 100644
--- a/Userland/Libraries/LibJS/JIT/Compiler.h
+++ b/Userland/Libraries/LibJS/JIT/Compiler.h
@@ -38,6 +38,7 @@ private:
     void compile_jump(Bytecode::Op::Jump const&);
     void compile_jump_conditional(Bytecode::Op::JumpConditional const&);
     void compile_increment(Bytecode::Op::Increment const&);
+    void compile_decrement(Bytecode::Op::Decrement const&);
     void compile_enter_unwind_context(Bytecode::Op::EnterUnwindContext const&);
     void compile_leave_unwind_context(Bytecode::Op::LeaveUnwindContext const&);
     void compile_throw(Bytecode::Op::Throw const&);