diff --git a/js/src/shell/js.cpp b/js/src/shell/js.cpp
index db8cae300c62..04391ad2a9c0 100644
--- a/js/src/shell/js.cpp
+++ b/js/src/shell/js.cpp
@@ -4100,7 +4100,11 @@ static bool Fuzzilli(JSContext* cx, unsigned argc, Value* vp) {
         MOZ_ASSERT(false);
         break;
       case 3:
+      #if defined(JS_CODEGEN_X64) || defined(JS_CODEGEN_X86)
         __asm__("int3");
+      #elif defined(JS_CODEGEN_ARM64)
+        __asm__("brk #0");
+      #endif
         break;
       default:
         exit(1);
diff --git a/js/src/shell/moz.build b/js/src/shell/moz.build
index f9ee1521d41d..b19c8076744e 100644
--- a/js/src/shell/moz.build
+++ b/js/src/shell/moz.build
@@ -31,7 +31,7 @@ if CONFIG["FUZZING_INTERFACES"]:
     else:
         USE_LIBS += ["static:fuzzer-interface"]
 
-if CONFIG["FUZZING_JS_FUZZILLI"]:
+if CONFIG["FUZZING_JS_FUZZILLI"] and CONFIG["OS_ARCH"] == "Linux":
     OS_LIBS += ["rt"]
 
 DEFINES["EXPORT_JS_API"] = True