diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c961d72a66..84b006e699 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2020-12-22  Shahab Vahedi  <shahab@synopsys.com>
+
+	* arc-linux-tdep.c: Replace "regnum" with "REGNUM" in comments.
+
 2020-12-22  Anton Kolesov  <anton.kolesov@synopsys.com>
 
 	* Makefile.in (ALLDEPFILES): Add arc-linux-nat.c.
diff --git a/gdb/arc-linux-tdep.c b/gdb/arc-linux-tdep.c
index db17fcfce5..62e3461686 100644
--- a/gdb/arc-linux-tdep.c
+++ b/gdb/arc-linux-tdep.c
@@ -483,7 +483,7 @@ arc_linux_supply_gregset (const struct regset *regset,
 
   const bfd_byte *buf = (const bfd_byte *) gregs;
 
-  /* regnum == -1 means writing all the registers.  */
+  /* REGNUM == -1 means writing all the registers.  */
   if (regnum == -1)
     for (int reg = 0; reg <= ARC_LAST_REGNUM; reg++)
       supply_register (regcache, reg, buf);
@@ -547,7 +547,7 @@ arc_linux_collect_gregset (const struct regset *regset,
   gdb_byte *buf = (gdb_byte *) gregs;
   struct gdbarch *gdbarch = regcache->arch ();
 
-  /* regnum == -1 means writing all the registers.  */
+  /* REGNUM == -1 means writing all the registers.  */
   if (regnum == -1)
     for (int reg = 0; reg <= ARC_LAST_REGNUM; reg++)
       collect_register (regcache, gdbarch, reg, buf);