diff --git a/lib/efi_loader/efi_firmware.c b/lib/efi_loader/efi_firmware.c
index 112775d..5a754c9 100644
--- a/lib/efi_loader/efi_firmware.c
+++ b/lib/efi_loader/efi_firmware.c
@@ -6,6 +6,8 @@
  *			Author: AKASHI Takahiro
  */
 
+#define LOG_CATEGORY LOGC_EFI
+
 #include <charset.h>
 #include <dfu.h>
 #include <efi_loader.h>