diff --git a/.gitattributes b/.gitattributes
index f720c72158..4d259beb73 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -11892,6 +11892,7 @@ tests/webtbs/tw20527.pp svneol=native#text/plain
 tests/webtbs/tw20557.pp svneol=native#text/pascal
 tests/webtbs/tw2059.pp svneol=native#text/plain
 tests/webtbs/tw20594.pp svneol=native#text/pascal
+tests/webtbs/tw20638.pp svneol=native#text/pascal
 tests/webtbs/tw2065.pp svneol=native#text/plain
 tests/webtbs/tw2069.pp svneol=native#text/plain
 tests/webtbs/tw2072.pp svneol=native#text/plain
diff --git a/compiler/ptype.pas b/compiler/ptype.pas
index 00b4f3f96d..96a6c0af4e 100644
--- a/compiler/ptype.pas
+++ b/compiler/ptype.pas
@@ -819,7 +819,7 @@ implementation
                       begin
                         if member_blocktype=bt_general then
                           begin
-                            if (not fields_allowed) then
+                            if (not fields_allowed)and(idtoken<>_CASE) then
                               Message(parser_e_field_not_allowed_here);
                             vdoptions:=[vd_record];
                             if classfields then
diff --git a/tests/webtbs/tw20638.pp b/tests/webtbs/tw20638.pp
new file mode 100644
index 0000000000..408624a8e7
--- /dev/null
+++ b/tests/webtbs/tw20638.pp
@@ -0,0 +1,197 @@
+{%norun}
+program project1;
+{$mode delphi}
+uses
+  SysUtils, Math;
+
+
+type
+  TVector3 = record
+    public
+      // constructor
+//      constructor create(const x: Single; const y: Single; const z: Single);
+
+      // overloaded operators
+      class operator negative(const a : TVector3)             : TVector3; inline;
+
+      class operator add(const a, b : TVector3)               : TVector3; inline;
+      class operator subtract(const a, b : TVector3)          : TVector3; inline;
+      class operator multiply(const a, b : TVector3)          : TVector3; inline;
+      class operator multiply(const a : single; b : TVector3) : TVector3; inline;
+      class operator multiply(const a : TVector3; b : single) : TVector3; inline;
+
+      class operator equal(const a, b : TVector3)             : boolean; inline;
+
+
+      // methods
+      function normalize  : TVector3; inline;                 // normalized vector
+      function length     : single;   inline;                 // length of a vector
+
+      function dot(const v : TVector3)   : single;   inline;  // dot product
+      function cross(const v : TVector3) : TVector3; inline;  // cross product
+	  // variant record part
+      case Boolean of
+        TRUE:        (x : single;
+                      y : single;
+                      z : single; );
+        FALSE:       (e : array[0..2] of single; );
+  end;
+
+// constants
+const
+  X_AXIS : TVector3 = (x: 1.0; y: 1.0; z: 1.0);
+  Y_AXIS : TVector3 = (x: 0.0; y: 1.0; z: 0.0);
+  Z_AXIS : TVector3 = (x: 0.0; y: 0.0; z: 1.0);
+
+  ZERO   : TVector3 = (x: 0.0; y: 0.0; z: 0.0);
+  ONE    : TVector3 = (x: 1.0; y: 1.0; z: 1.0);
+
+  JITTERED_X_AXIS : TVector3 = (x: 1.0;    y: 0.0072; z: 0.0034);
+  JITTERED_Y_AXIS : TVector3 = (x: 0.0072; y: 1.0;    z: 0.0034);
+  JITTERED_Z_AXIS : TVector3 = (x: 0.0034; y: 0.0072; z: 1.0);
+
+// constructor
+{
+constructor TVector3.create(const x: Single; const y: Single; const z: Single);
+begin
+  self.x := x;
+  self.y := y;
+  self.z := z;
+end;
+}
+// overloaded operators
+class operator TVector3.negative(const a : TVector3) : TVector3;
+begin
+  Result.x := -a.x;
+  Result.y := -a.y;
+  Result.z := -a.z;
+end;
+
+
+class operator TVector3.add(const a, b : TVector3) : TVector3;
+begin
+  Result.x := a.x + b.x;
+  Result.y := a.y + b.y;
+  Result.z := a.z + b.z;
+end;
+
+
+class operator TVector3.subtract(const a, b : TVector3) : TVector3;
+begin
+  Result.x := a.x - b.x;
+  Result.y := a.y - b.y;
+  Result.z := a.z - b.z;
+end;
+
+
+class operator TVector3.multiply(const a, b : TVector3) : TVector3;
+begin
+  Result.x := a.x * b.x;
+  Result.y := a.y * b.y;
+  Result.z := a.z * b.z;
+end;
+
+
+class operator TVector3.multiply(const a : single; b : TVector3) : TVector3;
+begin
+  Result.x := a * b.x;
+  Result.y := a * b.y;
+  Result.z := a * b.z;
+end;
+
+
+class operator TVector3.multiply(const a : TVector3; b : single) : TVector3;
+begin
+  Result.x := a.x * b;
+  Result.y := a.y * b;
+  Result.z := a.z * b;
+end;
+
+
+class operator TVector3.equal(const a, b : TVector3) : boolean;
+begin
+  Result := (a.x = b.x) and (a.y = b.y) and (a.z = b.z);
+end;
+
+
+// methods
+function TVector3.normalize : TVector3;
+var
+  invLen : single;
+begin
+  invLen := 1.0 / sqrt(x * x + y * y + z * z);
+
+  Result.x := x * invLen;
+  Result.y := y * invLen;
+  Result.z := z * invLen;
+end;
+
+
+function TVector3.length : single;
+begin
+  Result := sqrt(x * x + y * y + z * z);
+end;
+
+
+function TVector3.dot(const v : TVector3) : single;
+begin
+  Result := x * v.x + y * v.y + z * v.z;
+end;
+
+
+function TVector3.cross(const v : TVector3) : TVector3;
+begin
+  Result.x := y * v.z - z * v.y;
+  Result.y := z * v.x - x * v.z;
+  Result.z := x * v.y - y * v.x;
+end;
+
+
+// functions
+function init(vx, vy, vz : single) : TVector3;
+begin
+  Result.x := vx;
+  Result.y := vy;
+  Result.z := vz;
+end;
+
+
+function unitize(const v : TVector3)  : TVector3;
+var
+  invLen : single;
+begin
+  invLen := 1.0 / sqrt(v.x * v.x + v.y * v.y + v.z * v.z);
+
+  Result.x := v.x * invLen;
+  Result.y := v.y * invLen;
+  Result.z := v.z * invLen;
+end;
+
+
+function dot(const a, b : TVector3)   : single;
+begin
+  Result := a.x * b.x + a.y * b.y + a.z * b.z;
+end;
+
+
+function cross(const a, b : TVector3) : TVector3;
+begin
+  Result.x := a.y * b.z - a.z * b.y;
+  Result.y := a.z * b.x - a.x * b.z;
+  Result.z := a.x * b.y - a.y * b.x;
+end;
+
+
+// output functions
+function str(v : TVector3) : string; overload;
+begin
+  Result := '[ '
+            + FloatToStr(v.x) + ', '
+            + FloatToStr(v.y) + ', '
+            + FloatToStr(v.z)
+            + '] ';
+end;
+
+begin
+end.
+