diff --git a/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp b/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
index 2d6874bd0d1..eaa77627aed 100644
--- a/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
+++ b/Userland/DevTools/UserspaceEmulator/SoftCPU.cpp
@@ -2384,6 +2384,7 @@ void SoftCPU::INC_reg32(const X86::Instruction& insn)
 void SoftCPU::INSB(const X86::Instruction&) { TODO_INSN(); }
 void SoftCPU::INSD(const X86::Instruction&) { TODO_INSN(); }
 void SoftCPU::INSW(const X86::Instruction&) { TODO_INSN(); }
+void SoftCPU::INT1(const X86::Instruction&) { TODO_INSN(); }
 void SoftCPU::INT3(const X86::Instruction&) { TODO_INSN(); }
 void SoftCPU::INTO(const X86::Instruction&) { TODO_INSN(); }
 
diff --git a/Userland/DevTools/UserspaceEmulator/SoftCPU.h b/Userland/DevTools/UserspaceEmulator/SoftCPU.h
index c9713cdb3ee..3d5f287e7f9 100644
--- a/Userland/DevTools/UserspaceEmulator/SoftCPU.h
+++ b/Userland/DevTools/UserspaceEmulator/SoftCPU.h
@@ -729,6 +729,7 @@ private:
     virtual void INSB(const X86::Instruction&) override;
     virtual void INSD(const X86::Instruction&) override;
     virtual void INSW(const X86::Instruction&) override;
+    virtual void INT1(const X86::Instruction&) override;
     virtual void INT3(const X86::Instruction&) override;
     virtual void INTO(const X86::Instruction&) override;
     virtual void INT_imm8(const X86::Instruction&) override;
diff --git a/Userland/Libraries/LibX86/Instruction.cpp b/Userland/Libraries/LibX86/Instruction.cpp
index a0d74c23cff..2e0fac7059a 100644
--- a/Userland/Libraries/LibX86/Instruction.cpp
+++ b/Userland/Libraries/LibX86/Instruction.cpp
@@ -625,6 +625,8 @@ static void build_slash_reg(u8 op, u8 slash, const char* mnemonic, InstructionFo
     build(0xEE, "OUT", OP_DX_AL, &Interpreter::OUT_DX_AL);
     build(0xEF, "OUT", OP_DX_AX, &Interpreter::OUT_DX_AX, OP_DX_EAX, &Interpreter::OUT_DX_EAX);
 
+    build(0xF1, "INT1", OP, &Interpreter::INT1);
+
     build(0xF4, "HLT", OP, &Interpreter::HLT);
     build(0xF5, "CMC", OP, &Interpreter::CMC);
 
diff --git a/Userland/Libraries/LibX86/Interpreter.h b/Userland/Libraries/LibX86/Interpreter.h
index 78a990b478f..b451acd7775 100644
--- a/Userland/Libraries/LibX86/Interpreter.h
+++ b/Userland/Libraries/LibX86/Interpreter.h
@@ -276,6 +276,7 @@ public:
     virtual void INSB(const Instruction&) = 0;
     virtual void INSD(const Instruction&) = 0;
     virtual void INSW(const Instruction&) = 0;
+    virtual void INT1(const Instruction&) = 0;
     virtual void INT3(const Instruction&) = 0;
     virtual void INTO(const Instruction&) = 0;
     virtual void INT_imm8(const Instruction&) = 0;