diff --git a/ChangeLog b/ChangeLog
index 57d7dfb3e..60348fde1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2012-03-04  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* include/grub/misc.h (ALIGN_UP_OVERHEAD): New define.
+	* grub-core/loader/i386/linux.c (grub_cmd_initrd): Align initrds at 4.
+	* grub-core/loader/i386/pc/linux.c (grub_cmd_initrd): Likewise.
+	* grub-core/loader/ia64/efi/linux.c (grub_cmd_initrd): Likewise.
+	* grub-core/loader/mips/linux.c (grub_cmd_initrd): Likewise.
+	* grub-core/loader/powerpc/ieee1275/linux.c (grub_cmd_initrd): Likewise.
+	* grub-core/loader/sparc64/ieee1275/linux.c (grub_cmd_initrd): Likewise.
+
 2012-03-04  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* grub-core/commands/menuentry.c (options): Remove
diff --git a/grub-core/loader/i386/linux.c b/grub-core/loader/i386/linux.c
index bc1c81fb8..df133c2cb 100644
--- a/grub-core/loader/i386/linux.c
+++ b/grub-core/loader/i386/linux.c
@@ -1034,7 +1034,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      size += grub_file_size (files[i]);
+      size += ALIGN_UP (grub_file_size (files[i]), 4);
     }
 
   initrd_pages = (page_align (size) >> 12);
@@ -1101,6 +1101,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
 
   grub_dprintf ("linux", "Initrd, addr=0x%x, size=0x%x\n",
diff --git a/grub-core/loader/i386/pc/linux.c b/grub-core/loader/i386/pc/linux.c
index 90497c0cc..4eeb1b6c2 100644
--- a/grub-core/loader/i386/pc/linux.c
+++ b/grub-core/loader/i386/pc/linux.c
@@ -421,7 +421,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      size += grub_file_size (files[i]);
+      size += ALIGN_UP (grub_file_size (files[i]), 4);
     }
 
   {
@@ -449,6 +449,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
 
   lh->ramdisk_image = initrd_addr;
diff --git a/grub-core/loader/ia64/efi/linux.c b/grub-core/loader/ia64/efi/linux.c
index 5301fa67a..17843fdbf 100644
--- a/grub-core/loader/ia64/efi/linux.c
+++ b/grub-core/loader/ia64/efi/linux.c
@@ -597,7 +597,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      initrd_size += grub_file_size (files[i]);
+      initrd_size += ALIGN_UP (grub_file_size (files[i]), 4);
       grub_dprintf ("linux", "File %d: %s\n", i, argv[i]);
     }
 
@@ -624,6 +624,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
  fail:
   for (i = 0; i < nfiles; i++)
diff --git a/grub-core/loader/mips/linux.c b/grub-core/loader/mips/linux.c
index 2b7df0a78..f2cf7ccfc 100644
--- a/grub-core/loader/mips/linux.c
+++ b/grub-core/loader/mips/linux.c
@@ -468,7 +468,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      size += grub_file_size (files[i]);
+      size += ALIGN_UP (grub_file_size (files[i]), 4);
     }
 
   {
@@ -499,6 +499,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
 
 #ifdef GRUB_MACHINE_MIPS_QEMU_MIPS
diff --git a/grub-core/loader/powerpc/ieee1275/linux.c b/grub-core/loader/powerpc/ieee1275/linux.c
index 3929b0f37..5cfa988f6 100644
--- a/grub-core/loader/powerpc/ieee1275/linux.c
+++ b/grub-core/loader/powerpc/ieee1275/linux.c
@@ -350,7 +350,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      size += grub_file_size (files[i]);
+      size += ALIGN_UP (grub_file_size (files[i]), 4);
     }
 
   first_addr = linux_addr + linux_size;
@@ -376,6 +376,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
 
   initrd_addr = addr;
diff --git a/grub-core/loader/sparc64/ieee1275/linux.c b/grub-core/loader/sparc64/ieee1275/linux.c
index 351a74cb5..06d1df6ae 100644
--- a/grub-core/loader/sparc64/ieee1275/linux.c
+++ b/grub-core/loader/sparc64/ieee1275/linux.c
@@ -403,7 +403,7 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
       if (! files[i])
 	goto fail;
       nfiles++;
-      size += grub_file_size (files[i]);
+      size += ALIGN_UP(grub_file_size (files[i]), 4);
     }
 
   addr = 0x60000000;
@@ -438,6 +438,8 @@ grub_cmd_initrd (grub_command_t cmd __attribute__ ((unused)),
 	  goto fail;
 	}
       ptr += cursize;
+      grub_memset (ptr, 0, ALIGN_UP_OVERHEAD (cursize, 4));
+      ptr += ALIGN_UP_OVERHEAD (cursize, 4);
     }
 
   initrd_addr = addr;
diff --git a/include/grub/misc.h b/include/grub/misc.h
index e3d61d75b..a87c43691 100644
--- a/include/grub/misc.h
+++ b/include/grub/misc.h
@@ -44,6 +44,7 @@
 
 #define ALIGN_UP(addr, align) \
 	((addr + (typeof (addr)) align - 1) & ~((typeof (addr)) align - 1))
+#define ALIGN_UP_OVERHEAD(addr, align) ((-(addr)) & ((typeof (addr)) (align) - 1))
 #define ALIGN_DOWN(addr, align) \
 	((addr) & ~((typeof (addr)) align - 1))
 #define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))