diff --git a/disas/microblaze.c b/disas/microblaze.c
index 407c0a3ffa..7795a0bdb9 100644
--- a/disas/microblaze.c
+++ b/disas/microblaze.c
@@ -159,7 +159,7 @@ enum microblaze_instr_type {
 #define MIN_PVR_REGNUM 0
 #define MAX_PVR_REGNUM 15
 
-#define REG_PC  32 /* PC */
+/* 32 is REG_PC */
 #define REG_MSR 33 /* machine status reg */
 #define REG_EAR 35 /* Exception reg */
 #define REG_ESR 37 /* Exception reg */