diff --git a/kernel/arch/i386/linker.ld b/kernel/arch/i386/linker.ld
index 22b13ce..4e02872 100644
--- a/kernel/arch/i386/linker.ld
+++ b/kernel/arch/i386/linker.ld
@@ -52,8 +52,12 @@ SECTIONS {
         *(.note.gnu.build-id)
     }
 
+    _kernel_size = _kernel_end - _kernel_start;
+
 }
 
+ASSERT(_kernel_size < 0x300000, "Kernel size exceeds 3MB");
+
 /*
  * Note:
  *  COMMON section keeps data objects that are not yet allocated,