diff --git a/.gitattributes b/.gitattributes
index 1fb842a740..e9e1313032 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -12967,6 +12967,7 @@ tests/webtbs/tw2305.pp svneol=native#text/plain
 tests/webtbs/tw2306.pp svneol=native#text/plain
 tests/webtbs/tw2307.pp svneol=native#text/plain
 tests/webtbs/tw2311.pp svneol=native#text/plain
+tests/webtbs/tw23136.pp svneol=native#text/pascal
 tests/webtbs/tw2317.pp svneol=native#text/plain
 tests/webtbs/tw2318.pp svneol=native#text/plain
 tests/webtbs/tw23185.pp svneol=native#text/pascal
diff --git a/compiler/pexpr.pas b/compiler/pexpr.pas
index 38fac6c871..6cfd8e53ff 100644
--- a/compiler/pexpr.pas
+++ b/compiler/pexpr.pas
@@ -2814,6 +2814,11 @@ implementation
                begin
                  p1:=cstringconstnode.createpchar(ansistring2pchar(cstringpattern),length(cstringpattern));
                  consume(_CSTRING);
+                 if token in postfixoperator_tokens then
+                   begin
+                     again:=true;
+                     postfixoperators(p1,again,getaddr);
+                   end;
                end;
 
              _CCHAR :
@@ -2826,6 +2831,11 @@ implementation
                begin
                  p1:=cstringconstnode.createunistr(patternw);
                  consume(_CWSTRING);
+                 if token in postfixoperator_tokens then
+                   begin
+                     again:=true;
+                     postfixoperators(p1,again,getaddr);
+                   end;
                end;
 
              _CWCHAR:
@@ -2842,7 +2852,7 @@ implementation
                  if try_to_consume(_LKLAMMER) then
                   begin
                     p1:=factor(true,false);
-                    if token in [_CARET,_POINT,_LECKKLAMMER] then
+                    if token in postfixoperator_tokens then
                      begin
                        again:=true;
                        postfixoperators(p1,again,getaddr);
@@ -2852,7 +2862,7 @@ implementation
                   end
                  else
                   p1:=factor(true,false);
-                 if token in [_CARET,_POINT,_LECKKLAMMER] then
+                 if token in postfixoperator_tokens then
                   begin
                     again:=true;
                     postfixoperators(p1,again,getaddr);
@@ -2875,9 +2885,9 @@ implementation
                  consume(_LKLAMMER);
                  p1:=comp_expr(true,false);
                  consume(_RKLAMMER);
-                 { it's not a good solution     }
-                 { but (a+b)^ makes some problems  }
-                 if token in [_CARET,_POINT,_LECKKLAMMER] then
+                 { it's not a good solution
+                   but (a+b)^ makes some problems  }
+                 if token in postfixoperator_tokens then
                   begin
                     again:=true;
                     postfixoperators(p1,again,getaddr);
diff --git a/compiler/tokens.pas b/compiler/tokens.pas
index 9503ced33b..18c14d959c 100644
--- a/compiler/tokens.pas
+++ b/compiler/tokens.pas
@@ -299,6 +299,8 @@ const
   tokenlenmin = 1;
   tokenlenmax = 18;
 
+  postfixoperator_tokens = [_CARET,_POINT,_LECKKLAMMER];
+
   { last operator which can be overloaded, the first_overloaded should
     be declared directly after NOTOKEN }
   first_overloaded = succ(NOTOKEN);
diff --git a/tests/webtbs/tw23136.pp b/tests/webtbs/tw23136.pp
new file mode 100644
index 0000000000..a3df4afdf9
--- /dev/null
+++ b/tests/webtbs/tw23136.pp
@@ -0,0 +1,14 @@
+var
+ ws:widestring;
+ s:string;
+begin
+  s:='Aajsljaklsja'[1];
+  if s<>'A' then
+    halt(1);
+
+  ws:=#1234#134#312[1];
+  if ws<>#1234 then
+    halt(1);
+
+  writeln('ok');
+end.