diff --git a/proc/sig.c b/proc/sig.c
index f2db90e7..f5971637 100644
--- a/proc/sig.c
+++ b/proc/sig.c
@@ -159,7 +159,7 @@ static const char *signal_number_to_name(int signo){
   return buf;
 }
 
-int print_given_signals(int argc, const char **argv, int max_line){
+int print_given_signals(int argc, const char *restrict const *restrict argv, int max_line){
   char buf[1280]; /* 128 signals, "RTMIN+xx" is largest */
   int ret = 0;  /* to be used as exit code by caller */
   int place = 0; /* position on this line */
diff --git a/proc/sig.h b/proc/sig.h
index 412093a3..9640f989 100644
--- a/proc/sig.h
+++ b/proc/sig.h
@@ -14,7 +14,7 @@
 /* return -1 on failure */
 extern int signal_name_to_number(const char *restrict name);
 
-extern int print_given_signals(int argc,  const char **argv, int max_line);
+extern int print_given_signals(int argc, const char *restrict const *restrict argv, int max_line);
 
 extern void pretty_print_signals(void);
 
diff --git a/skill.c b/skill.c
index dbd9ac0c..18ebbd1b 100644
--- a/skill.c
+++ b/skill.c
@@ -31,7 +31,7 @@ static int f_flag, i_flag, v_flag, w_flag, n_flag;
 static int tty_count, uid_count, cmd_count, pid_count;
 static int *ttys;
 static uid_t *uids;
-static char **cmds;
+static const char **cmds;
 static int *pids;
 
 #define ENLIST(thing,addme) do{ \
@@ -535,8 +535,8 @@ selection_collection:
 }
 
 /***** main body */
-int main(int argc, char *argv[]){
-  char *tmpstr;
+int main(int argc, const char *argv[]){
+  const char *tmpstr;
   my_pid = getpid();
   saved_argc = argc;
   if(!argc){