diff --git a/src/parallel b/src/parallel
index 31f4ac1b..f6fc091a 100755
--- a/src/parallel
+++ b/src/parallel
@@ -184,7 +184,7 @@ if($::opt_nonall or $::opt_onall) {
 	     ((defined $::opt_group) ? "-g" : ""),
 	     ((defined $::opt_joblog) ? "--joblog $::opt_joblog" : ""),
 	     ((defined $::opt_colsep) ? "--colsep ".shell_quote($::opt_colsep) : ""),
-	     ((defined @::opt_v) ? "-vv" : ""),
+	     ((@::opt_v) ? "-vv" : ""),
 	     ((defined $::opt_D) ? "-D" : ""),
 	     ((defined $::opt_timeout) ? "--timeout ".$::opt_timeout : ""),
 	);
@@ -605,7 +605,7 @@ sub parse_options {
 	    print STDERR "$Global::progname: -H has been retired. Use --halt.\n";
             ::wait_and_exit(255);
     }
-    if(defined @::opt_v) { $Global::verbose = $#::opt_v+1; } # Convert -v -v to v=2
+    if(@::opt_v) { $Global::verbose = $#::opt_v+1; } # Convert -v -v to v=2
     $Global::debug = (defined $::opt_D);
     if(defined $::opt_X) { $Global::ContextReplace = 1; }
     if(defined $::opt_silent) { $Global::verbose = 0; }
@@ -651,9 +651,9 @@ sub parse_options {
     if(defined $::opt_version) { version(); wait_and_exit(0); }
     if(defined $::opt_bibtex) { bibtex(); wait_and_exit(0); }
     if(defined $::opt_show_limits) { show_limits(); }
-    if(defined @::opt_sshlogin) { @Global::sshlogin = @::opt_sshlogin; }
-    if(defined @::opt_sshloginfile) { read_sshloginfiles(@::opt_sshloginfile); }
-    if(defined @::opt_return) { push @Global::ret_files, @::opt_return; }
+    if(@::opt_sshlogin) { @Global::sshlogin = @::opt_sshlogin; }
+    if(@::opt_sshloginfile) { read_sshloginfiles(@::opt_sshloginfile); }
+    if(@::opt_return) { push @Global::ret_files, @::opt_return; }
     if(not defined $::opt_recstart and
        not defined $::opt_recend) { $::opt_recend = "\n"; }
     if(not defined $::opt_blocksize) { $::opt_blocksize = "1M"; }
@@ -704,7 +704,7 @@ sub parse_options {
             $Global::grouped = 0;
         }
     }
-    if(defined @::opt_trc) {
+    if(@::opt_trc) {
         push @Global::ret_files, @::opt_trc;
         $::opt_transfer = 1;
         $::opt_cleanup = 1;
@@ -1567,19 +1567,19 @@ sub parse_sshlogin {
     if($::opt_transfer or @::opt_return or $::opt_cleanup or @::opt_basefile) {
         if(not remote_hosts()) {
             # There are no remote hosts
-            if(defined @::opt_trc) {
+            if(@::opt_trc) {
                 print $Global::original_stderr
                     "parallel: Warning: --trc ignored as there are no remote --sshlogin\n";
             } elsif (defined $::opt_transfer) {
                 print $Global::original_stderr
                     "parallel: Warning: --transfer ignored as there are no remote --sshlogin\n";
-            } elsif (defined @::opt_return) {
+            } elsif (@::opt_return) {
                 print $Global::original_stderr
                     "parallel: Warning: --return ignored as there are no remote --sshlogin\n";
             } elsif (defined $::opt_cleanup) {
                 print $Global::original_stderr
                     "parallel: Warning: --cleanup ignored as there are no remote --sshlogin\n";
-            } elsif (defined @::opt_basefile) {
+            } elsif (@::opt_basefile) {
                 print $Global::original_stderr
                     "parallel: Warning: --basefile ignored as there are no remote --sshlogin\n";
             }