diff --git a/include/efi.h b/include/efi.h
index d5af213..84640cf 100644
--- a/include/efi.h
+++ b/include/efi.h
@@ -74,7 +74,7 @@
  * struct { u32 a; u16; b; u16 c; u8 d[8]; }; which is 4-byte
  * aligned.
  */
-typedef struct {
+typedef struct efi_guid {
 	u8 b[16];
 } efi_guid_t __attribute__((aligned(4)));
 
diff --git a/tools/eficapsule.h b/tools/eficapsule.h
index 6efd07d..97d0775 100644
--- a/tools/eficapsule.h
+++ b/tools/eficapsule.h
@@ -24,7 +24,7 @@
 
 #define ARRAY_SIZE(x)		(sizeof(x) / sizeof((x)[0]))
 
-typedef struct {
+typedef struct efi_guid {
 	uint8_t b[16];
 } efi_guid_t __aligned(8);