diff --git a/include/pe.h b/include/pe.h
index 36e1908b7e..c7aeb2dcb6 100644
--- a/include/pe.h
+++ b/include/pe.h
@@ -48,7 +48,6 @@ typedef struct _IMAGE_DOS_HEADER {
 
 #define IMAGE_NT_OPTIONAL_HDR32_MAGIC	0x10b
 #define IMAGE_NT_OPTIONAL_HDR64_MAGIC	0x20b
-#define IMAGE_SUBSYSTEM_EFI_APPLICATION	10
 
 typedef struct _IMAGE_FILE_HEADER {
 	uint16_t Machine;