diff --git a/packages/fcl-css/src/fpcssparser.pp b/packages/fcl-css/src/fpcssparser.pp
index 121e725675..f710ec9c9f 100644
--- a/packages/fcl-css/src/fpcssparser.pp
+++ b/packages/fcl-css/src/fpcssparser.pp
@@ -153,6 +153,8 @@ begin
     ctkMinus: Result:=uoMinus;
     ctkPlus: Result:=uoPlus;
     ctkDiv: Result:=uoDiv;
+    ctkGT: Result:=uoGT;
+    ctkTILDE: Result:=uoTilde;
   else
     Raise ECSSParser.CreateFmt(SUnaryInvalidToken,[GetEnumName(TypeInfo(aToken),Ord(aToken))]);
   end;
@@ -950,7 +952,7 @@ var
 
 begin
   Result:=nil;
-  if not (CurrentToken in [ctkDOUBLECOLON, ctkMinus, ctkPlus, ctkDiv]) then
+  if not (CurrentToken in [ctkDOUBLECOLON, ctkMinus, ctkPlus, ctkDiv, ctkGT, ctkTILDE]) then
     Raise ECSSParser.CreateFmt(SUnaryInvalidToken,[CurrentTokenString]);
   Un:=TCSSUnaryElement(CreateElement(TCSSUnaryElement));
   try
@@ -1058,7 +1060,9 @@ begin
     ctkLBRACKET: Result:=ParseArray(Nil);
     ctkMinus,
     ctkPlus,
-    ctkDiv: Result:=ParseUnary;
+    ctkDiv,
+    ctkGT,
+    ctkTilde: Result:=ParseUnary;
     ctkUnicodeRange: Result:=ParseUnicodeRange;
     ctkSTRING,
     ctkHASH : Result:=ParseString;
@@ -1066,8 +1070,7 @@ begin
     ctkFloat : Result:=ParseFloat;
     ctkPSEUDOFUNCTION,
     ctkFUNCTION : Result:=ParseCall('');
-    ctkSTAR,
-    ctkTILDE: Result:=ParseInvalidToken;
+    ctkSTAR: Result:=ParseInvalidToken;
     ctkIDENTIFIER: Result:=ParseIdentifier;
     ctkCLASSNAME : Result:=ParseClassName;
   else
@@ -1426,14 +1429,30 @@ end;
 procedure TCSSParser.ParseRelationalSelectorCommaList(aCall: TCSSCallElement);
 var
   El: TCSSElement;
+  aToken: TCSSToken;
+  IsUnary: Boolean;
+  Unary: TCSSUnaryElement;
 begin
   while not (CurrentToken in [ctkEOF,ctkRBRACKET,ctkRBRACE,ctkRPARENTHESIS]) do
     begin
-    if CurrentToken in [ctkGT,ctkPLUS,ctkTILDE,ctkPIPE] then
-      aCall.AddArg(ParseInvalidToken);
+    IsUnary:=false;
+    aToken:=CurrentToken;
+    if aToken in [ctkGT,ctkPLUS,ctkTILDE] then
+      begin
+      IsUnary:=true;
+      GetNextToken;
+      end;
     El:=ParseSelector;
-    if EL=nil then exit;
-    aCall.AddArg(El);
+    if El=nil then exit;
+    if IsUnary then
+      begin
+      Unary:=TCSSUnaryElement(CreateElement(TCSSUnaryElement));
+      aCall.AddArg(Unary);
+      Unary.Right:=El;
+      Unary.Operation:=TokenToUnaryOperation(aToken);
+      end
+    else
+      aCall.AddArg(El);
     if CurrentToken<>ctkCOMMA then
       exit;
     GetNextToken;
diff --git a/packages/fcl-css/src/fpcssresolver.pas b/packages/fcl-css/src/fpcssresolver.pas
index 78c46be5b0..d333c83d40 100644
--- a/packages/fcl-css/src/fpcssresolver.pas
+++ b/packages/fcl-css/src/fpcssresolver.pas
@@ -60,7 +60,6 @@ element/type: 1 p, :before
 *: 0
 
 ToDo:
-- replace parser invalidtoken for relational operators ctkGt, ctkTilde
 - :has()
 - 'all' attribute: resets all properties, except direction and unicode bidi
 - TCSSResolver.FindComputedAttribute  use binary search for >8 elements
diff --git a/packages/fcl-css/src/fpcsstree.pp b/packages/fcl-css/src/fpcsstree.pp
index c2a456b8cc..8cd0bb5836 100644
--- a/packages/fcl-css/src/fpcsstree.pp
+++ b/packages/fcl-css/src/fpcsstree.pp
@@ -158,7 +158,7 @@ Type
   end;
 
   { TCSSUnaryElement }
-  TCSSUnaryOperation = (uoDoubleColon,uoMinus,uoPlus,uoDiv);
+  TCSSUnaryOperation = (uoDoubleColon,uoMinus,uoPlus,uoDiv,uoGT,uoTilde);
   TCSSUnaryElement = Class(TCSSBaseUnaryElement)
   private
     FOperation: TCSSUnaryOperation;
@@ -397,7 +397,7 @@ Const
   CSSUnitNames : Array[TCSSUnits] of TCSSString =
         ('','px','%','rem','em','pt','fr','vw','vh','deg');
   UnaryOperators : Array[TCSSUnaryOperation] of TCSSString =
-        ('::','-','+','/');
+        ('::','-','+','/','>','~');
   BinaryOperators : Array[TCSSBinaryOperation] of TCSSString =
         ('=','+','-','and','<=','<','>=','>','/','*','~',':','::','^','|','$',' ',
          '*=','~=','^=','|=','$=');
diff --git a/packages/fcl-css/tests/tccsstree.pp b/packages/fcl-css/tests/tccsstree.pp
index 4d8e7cc0d7..9577e51ec7 100644
--- a/packages/fcl-css/tests/tccsstree.pp
+++ b/packages/fcl-css/tests/tccsstree.pp
@@ -575,9 +575,6 @@ end;
 
 procedure TCSSTreeAsStringTest.TestUNARYOP;
 
-Const
-  MyUnaryOperators : Array[TCSSUnaryOperation] of string =
-      ('::','-','+','/');
 Var
   Op : TCSSUnaryOperation;
   Sop : String;
@@ -586,7 +583,7 @@ begin
   For Op in TCSSUnaryOperation do
     begin
     CreateUnaryOperation(op,'a',amReplace);
-    Sop:=MyUnaryOperators[Op];
+    Sop:=UnaryOperators[Op];
     if Not (Op in [uoDoubleColon]) then
       Sop:=Sop+' ';
     AssertEquals('Value '+Sop,sop+'a',Element.AsString)