diff --git a/Userland/Libraries/LibJIT/Assembler.h b/Userland/Libraries/LibJIT/Assembler.h
index 5fac163c75..3aa80fbc47 100644
--- a/Userland/Libraries/LibJIT/Assembler.h
+++ b/Userland/Libraries/LibJIT/Assembler.h
@@ -6,8 +6,11 @@
 
 #pragma once
 
+#include <AK/Platform.h>
 #include <AK/Vector.h>
 
+#if ARCH(X86_64)
+
 namespace JIT {
 
 struct Assembler {
@@ -577,3 +580,5 @@ struct Assembler {
 };
 
 }
+
+#endif