diff --git a/src/callint.c b/src/callint.c
index d76836f32b2..449b5048609 100644
--- a/src/callint.c
+++ b/src/callint.c
@@ -35,7 +35,6 @@ static Lisp_Object point_marker;
 /* String for the prompt text used in Fcall_interactively.  */
 static Lisp_Object callint_message;
 
-/* ARGSUSED */
 DEFUN ("interactive", Finteractive, Sinteractive, 0, UNEVALLED, 0,
        doc: /* Specify a way of parsing arguments for interactive use of a function.
 For example, write
diff --git a/src/cm.c b/src/cm.c
index e09216a854b..7947d3565c5 100644
--- a/src/cm.c
+++ b/src/cm.c
@@ -30,7 +30,6 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 
 int cost;		/* sums up costs */
 
-/* ARGSUSED */
 int
 evalcost (int c)
 {
diff --git a/src/emacs.c b/src/emacs.c
index 5a526687b14..558dd11a351 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -923,7 +923,6 @@ load_pdump (int argc, char **argv)
 }
 #endif /* HAVE_PDUMPER */
 
-/* ARGSUSED */
 int
 main (int argc, char **argv)
 {
diff --git a/src/eval.c b/src/eval.c
index 06d5c63f7f7..2bfc16eae0e 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1890,7 +1890,6 @@ verror (const char *m, va_list ap)
 
 /* Dump an error message; called like printf.  */
 
-/* VARARGS 1 */
 void
 error (const char *m, ...)
 {
@@ -2649,7 +2648,6 @@ call0 (Lisp_Object fn)
 }
 
 /* Call function fn with 1 argument arg1.  */
-/* ARGSUSED */
 Lisp_Object
 call1 (Lisp_Object fn, Lisp_Object arg1)
 {
@@ -2657,7 +2655,6 @@ call1 (Lisp_Object fn, Lisp_Object arg1)
 }
 
 /* Call function fn with 2 arguments arg1, arg2.  */
-/* ARGSUSED */
 Lisp_Object
 call2 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2)
 {
@@ -2665,7 +2662,6 @@ call2 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2)
 }
 
 /* Call function fn with 3 arguments arg1, arg2, arg3.  */
-/* ARGSUSED */
 Lisp_Object
 call3 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3)
 {
@@ -2673,7 +2669,6 @@ call3 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3)
 }
 
 /* Call function fn with 4 arguments arg1, arg2, arg3, arg4.  */
-/* ARGSUSED */
 Lisp_Object
 call4 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
        Lisp_Object arg4)
@@ -2682,7 +2677,6 @@ call4 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
 }
 
 /* Call function fn with 5 arguments arg1, arg2, arg3, arg4, arg5.  */
-/* ARGSUSED */
 Lisp_Object
 call5 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
        Lisp_Object arg4, Lisp_Object arg5)
@@ -2691,7 +2685,6 @@ call5 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
 }
 
 /* Call function fn with 6 arguments arg1, arg2, arg3, arg4, arg5, arg6.  */
-/* ARGSUSED */
 Lisp_Object
 call6 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
        Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6)
@@ -2700,7 +2693,6 @@ call6 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
 }
 
 /* Call function fn with 7 arguments arg1, arg2, arg3, arg4, arg5, arg6, arg7.  */
-/* ARGSUSED */
 Lisp_Object
 call7 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
        Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6, Lisp_Object arg7)
@@ -2710,7 +2702,6 @@ call7 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
 
 /* Call function fn with 8 arguments arg1, arg2, arg3, arg4, arg5,
    arg6, arg7, arg8.  */
-/* ARGSUSED */
 Lisp_Object
 call8 (Lisp_Object fn, Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3,
        Lisp_Object arg4, Lisp_Object arg5, Lisp_Object arg6, Lisp_Object arg7,
diff --git a/src/fns.c b/src/fns.c
index df921e28f3b..f45c729cfaf 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -532,14 +532,12 @@ Do NOT use this function to compare file names for equality.  */)
 static Lisp_Object concat (ptrdiff_t nargs, Lisp_Object *args,
 			   enum Lisp_Type target_type, bool last_special);
 
-/* ARGSUSED */
 Lisp_Object
 concat2 (Lisp_Object s1, Lisp_Object s2)
 {
   return concat (2, ((Lisp_Object []) {s1, s2}), Lisp_String, 0);
 }
 
-/* ARGSUSED */
 Lisp_Object
 concat3 (Lisp_Object s1, Lisp_Object s2, Lisp_Object s3)
 {
@@ -2577,7 +2575,6 @@ This makes STRING unibyte and may change its length.  */)
   return Qnil;
 }
 
-/* ARGSUSED */
 Lisp_Object
 nconc2 (Lisp_Object s1, Lisp_Object s2)
 {
diff --git a/src/term.c b/src/term.c
index a88d47f9238..5f70c7a3d4f 100644
--- a/src/term.c
+++ b/src/term.c
@@ -1084,7 +1084,6 @@ int *char_ins_del_vector;
 
 #define char_ins_del_cost(f) (&char_ins_del_vector[FRAME_COLS ((f))])
 
-/* ARGSUSED */
 static void
 calculate_ins_del_char_costs (struct frame *f)
 {