diff --git a/cper-utils.h b/cper-utils.h
index f7878d4..07ad20f 100644
--- a/cper-utils.h
+++ b/cper-utils.h
@@ -14,6 +14,7 @@
 const char* severity_to_string(UINT8 severity);
 void guid_to_string(char* out, EFI_GUID* guid);
 int guid_equal(EFI_GUID* a, EFI_GUID* b);
+int bcd_to_int(UINT8 bcd);
 
 //The available severity types for CPER.
 extern const char* CPER_SEVERITY_TYPES[4];