diff --git a/bin/rt.in b/bin/rt.in
index 6ca302e19a5..280af51a8e4 100755
--- a/bin/rt.in
+++ b/bin/rt.in
@@ -1514,7 +1514,7 @@ sub vsplit {
         # XXX: This should become a real parser, à la Text::ParseWords.
         $line =~ s/^\s+//;
         $line =~ s/\s+$//;
-        my ( $a, $b ) = split /,/, $line, 2;
+        my ( $a, $b ) = split /\s*,\s*/, $line, 2;
 
         while ($a) {
             no warnings 'uninitialized';
@@ -1522,7 +1522,7 @@ sub vsplit {
                 my $s = $a;
                 while ( $a !~ /'$/ || (   $a !~ /(\\\\)+'$/
                             && $a =~ /(\\)+'$/ )) {
-                    ( $a, $b ) = split /,/, $b, 2;
+                    ( $a, $b ) = split /\s*,\s*/, $b, 2;
                     $s .= ',' . $a;
                 }
                 push @words, $s;
@@ -1531,7 +1531,7 @@ sub vsplit {
                 my $s = $a;
                 while ( $a !~ /}$/ ) {
                     ( $a, $b ) =
-                      split /,/, $b, 2;
+                      split /\s*,\s*/, $b, 2;
                     $s .= ',' . $a;
                 }
                 $s =~ s/^q{/'/;
@@ -1541,7 +1541,7 @@ sub vsplit {
             else {
                 push @words, $a;
             }
-            ( $a, $b ) = split /,/, $b, 2;
+            ( $a, $b ) = split /\s*,\s*/, $b, 2;
         }
 
 
@@ -1556,7 +1556,7 @@ sub expand_list {
     my ($list) = @_;
 
     my @elts;
-    foreach (split /,/, $list) {
+    foreach (split /\s*,\s*/, $list) {
         push @elts, /^(\d+)-(\d+)$/? ($1..$2): $_;
     }
 
diff --git a/lib/RT/Interface/REST.pm b/lib/RT/Interface/REST.pm
index 98e475b51fa..c7868321cdc 100755
--- a/lib/RT/Interface/REST.pm
+++ b/lib/RT/Interface/REST.pm
@@ -94,7 +94,7 @@ sub expand_list {
     my ($list) = @_;
 
     my @elts;
-    foreach (split /,/, $list) {
+    foreach (split /\s*,\s*/, $list) {
         push @elts, /^(\d+)-(\d+)$/? ($1..$2): $_;
     }
 
diff --git a/share/html/REST/1.0/Forms/ticket/default b/share/html/REST/1.0/Forms/ticket/default
index b82cb5ed620..4f20d901d31 100755
--- a/share/html/REST/1.0/Forms/ticket/default
+++ b/share/html/REST/1.0/Forms/ticket/default
@@ -368,14 +368,14 @@ else {
                 }
                 else {
                     my @new;
-                    my ( $a, $b ) = split /,/, $val, 2;
+                    my ( $a, $b ) = split /\s*,\s*/, $val, 2;
                     while ($a) {
                         no warnings 'uninitialized';
                         if ( $a =~ /^'/ ) {
                             my $s = $a;
                             while ( $a !~ /'$/ || ( $a !~ /(\\\\)+'$/
                                             && $a =~ /(\\)+'$/ ) ) {
-                                ( $a, $b ) = split /,/, $b, 2;
+                                ( $a, $b ) = split /\s*,\s*/, $b, 2;
                                 $s .= ',' . $a;
                             }
                             $s =~ s/^'//;
@@ -386,7 +386,7 @@ else {
                         elsif ( $a =~ /^q{/ ) {
                             my $s = $a;
                             while ( $a !~ /}$/ ) {
-                                ( $a, $b ) = split /,/, $b, 2;
+                                ( $a, $b ) = split /\s*,\s*/, $b, 2;
                                 $s .= ',' . $a;
                             }
                             $s =~ s/^q{//;
@@ -396,7 +396,7 @@ else {
                         else {
                             push @new, $a;
                         }
-                        ( $a, $b ) = split /,/, $b, 2;
+                        ( $a, $b ) = split /\s*,\s*/, $b, 2;
                     }
 
                     my %new;
diff --git a/share/html/REST/1.0/dhandler b/share/html/REST/1.0/dhandler
index 085bbb3042c..a8dcdba29c5 100755
--- a/share/html/REST/1.0/dhandler
+++ b/share/html/REST/1.0/dhandler
@@ -210,7 +210,7 @@ if ($fields) {
         $output = "Invalid field specification: $fields";
         goto OUTPUT;
     }
-    @fields = map lc, split /,/, $fields;
+    @fields = map lc, split /\s*,\s*/, $fields;
     @fields{@fields} = ();
     unless (exists $fields{id}) {
         unshift @fields, "id";
diff --git a/share/html/REST/1.0/search/ticket b/share/html/REST/1.0/search/ticket
index 46eb5ffcf18..84529ac78d0 100755
--- a/share/html/REST/1.0/search/ticket
+++ b/share/html/REST/1.0/search/ticket
@@ -69,7 +69,7 @@ if ($fields) {
         $output = "Invalid field specification: $fields";
         goto OUTPUT;
     }
-    @fields = map lc, split /,/, $fields;
+    @fields = map lc, split /\s*,\s*/, $fields;
     @fields{@fields} = ();
     unless (exists $fields{id}) {
         unshift @fields, "id";