diff --git a/arch/x86/include/asm/microcode_intel.h b/arch/x86/include/asm/microcode_intel.h
index 9067166409bfe32b07358b74596032194628ef14..bbe296e0bce1995ca8f9324b801ef09714e6399c 100644
--- a/arch/x86/include/asm/microcode_intel.h
+++ b/arch/x86/include/asm/microcode_intel.h
@@ -43,7 +43,7 @@ struct extended_sigtable {
 #define DWSIZE			(sizeof(u32))
 
 #define get_totalsize(mc) \
-	(((struct microcode_intel *)mc)->hdr.totalsize ? \
+	(((struct microcode_intel *)mc)->hdr.datasize ? \
 	 ((struct microcode_intel *)mc)->hdr.totalsize : \
 	 DEFAULT_UCODE_TOTALSIZE)