diff --git a/src/include/efivar/efivar-types.h b/src/include/efivar/efivar-types.h
index 34b333fa..25a8178f 100644
--- a/src/include/efivar/efivar-types.h
+++ b/src/include/efivar/efivar-types.h
@@ -20,7 +20,7 @@ typedef struct {
 	uint16_t	c;
 	uint16_t	d;
 	uint8_t		e[6];
-} efi_guid_t __attribute__((__aligned__(1)));
+} efi_guid_t __attribute__((__aligned__(4)));
 
 #if BYTE_ORDER == LITTLE_ENDIAN
 #define EFI_GUID(a,b,c,d,e0,e1,e2,e3,e4,e5) \