diff --git a/ChangeLog b/ChangeLog
index b643c7787..44663b91c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* grub-core/efiemu/runtime/efiemu.c (efiemu_get_variable): Add missing
+	const qualifier.
+	(efiemu_memequal): Likewise.
+	(find_variable): Likewise.
+
 2012-02-27  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	Fix missing console prototype on qemu-mips.
diff --git a/grub-core/efiemu/runtime/efiemu.c b/grub-core/efiemu/runtime/efiemu.c
index 2c71fbed0..8ca1493ba 100644
--- a/grub-core/efiemu/runtime/efiemu.c
+++ b/grub-core/efiemu/runtime/efiemu.c
@@ -66,7 +66,7 @@ efiemu_convert_pointer (grub_efi_uintn_t debug_disposition,
 
 grub_efi_status_t
 efiemu_get_variable (grub_efi_char16_t *variable_name,
-		     grub_efi_guid_t *vendor_guid,
+		     const grub_efi_guid_t *vendor_guid,
 		     grub_efi_uint32_t *attributes,
 		     grub_efi_uintn_t *data_size,
 		     void *data);
@@ -155,7 +155,7 @@ efiemu_str16len (grub_uint16_t *a)
 }
 
 static int
-efiemu_memequal (void *a, void *b, grub_size_t n)
+efiemu_memequal (const void *a, const void *b, grub_size_t n)
 {
   grub_uint8_t *ptr1, *ptr2;
   for (ptr1 = (grub_uint8_t *) a, ptr2 = (grub_uint8_t *)b;
@@ -416,7 +416,7 @@ EFI_FUNC (efiemu_convert_pointer) (grub_efi_uintn_t debug_disposition,
 
 /* Find variable by name and GUID. */
 static struct efi_variable *
-find_variable (grub_efi_guid_t *vendor_guid,
+find_variable (const grub_efi_guid_t *vendor_guid,
 	       grub_efi_char16_t *variable_name)
 {
   grub_uint8_t *ptr;
@@ -438,10 +438,10 @@ find_variable (grub_efi_guid_t *vendor_guid,
 
 grub_efi_status_t
 EFI_FUNC (efiemu_get_variable) (grub_efi_char16_t *variable_name,
-				   grub_efi_guid_t *vendor_guid,
-				   grub_efi_uint32_t *attributes,
-				   grub_efi_uintn_t *data_size,
-				   void *data)
+				const grub_efi_guid_t *vendor_guid,
+				grub_efi_uint32_t *attributes,
+				grub_efi_uintn_t *data_size,
+				void *data)
 {
   struct efi_variable *efivar;
   LOG ('g');