diff --git a/src/dynarmic/backend/arm64/emit_arm64.cpp b/src/dynarmic/backend/arm64/emit_arm64.cpp
index 2a92e6ff..91dd28ce 100644
--- a/src/dynarmic/backend/arm64/emit_arm64.cpp
+++ b/src/dynarmic/backend/arm64/emit_arm64.cpp
@@ -38,10 +38,11 @@ void EmitIR<IR::Opcode::Breakpoint>(oaknut::CodeGenerator& code, EmitContext&, I
 
 template<>
 void EmitIR<IR::Opcode::CallHostFunction>(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) {
-    (void)code;
-    (void)ctx;
-    (void)inst;
-    ASSERT_FALSE("Unimplemented");
+    auto args = ctx.reg_alloc.GetArgumentInfo(inst);
+
+    ctx.reg_alloc.PrepareForCall(nullptr, args[1], args[2], args[3]);
+    code.MOV(Xscratch0, args[0].GetImmediateU64());
+    code.BLR(Xscratch0);
 }
 
 template<>