diff --git a/torch/_inductor/codegen/cpp_wrapper_cpu.py b/torch/_inductor/codegen/cpp_wrapper_cpu.py
index 08c6a586e986..1152bf4dce2c 100644
--- a/torch/_inductor/codegen/cpp_wrapper_cpu.py
+++ b/torch/_inductor/codegen/cpp_wrapper_cpu.py
@@ -1503,12 +1503,19 @@ class CppWrapperCpu(PythonWrapperCodegen):
         # This is why writeline needs to explicitly passed in as a parameter.
         var = f"int_array_{next(self.int_array_id)}"
         ctype = "int64_t"
-        if var not in self.declared_int_array_vars:
-            self.declared_int_array_vars.add(var)
+        if int_array == "{}":
+            #  An array of unknown bound cannot be initialized with {}.
             if known_statically:
-                writeline(f"static constexpr {ctype} {var}[] = {int_array};")
+                writeline(f"static constexpr {ctype} *{var}=nullptr;")
             else:
-                writeline(f"const {ctype} {var}[] = {int_array};")
+                writeline(f"const {ctype} *{var}=nullptr;")
+        else:
+            if var not in self.declared_int_array_vars:
+                self.declared_int_array_vars.add(var)
+                if known_statically:
+                    writeline(f"static constexpr {ctype} {var}[] = {int_array};")
+                else:
+                    writeline(f"const {ctype} {var}[] = {int_array};")
         return var
 
     def make_buffer_allocation(self, buffer):