diff --git a/packages/fcl-base/fpmake.pp b/packages/fcl-base/fpmake.pp
index f7a3f8270f..9b36a94a7f 100644
--- a/packages/fcl-base/fpmake.pp
+++ b/packages/fcl-base/fpmake.pp
@@ -137,6 +137,7 @@ begin
     P.Sources.AddSrcFiles('src/win/fclel.*', P.Directory);
     // Install windows resources
     P.InstallFiles.Add('src/win/fclel.res',AllWindowsOSes,'$(unitinstalldir)');
+    T:=P.Targets.addUnit('basenenc.pp');
 
     // Examples
     P.ExamplePath.Add('examples');
diff --git a/packages/rtl-extra/src/inc/basenenc.pp b/packages/fcl-base/src/basenenc.pp
similarity index 98%
rename from packages/rtl-extra/src/inc/basenenc.pp
rename to packages/fcl-base/src/basenenc.pp
index 40a1e60b0d..1287190ff4 100644
--- a/packages/rtl-extra/src/inc/basenenc.pp
+++ b/packages/fcl-base/src/basenenc.pp
@@ -19,9 +19,10 @@ unit basenenc;
 
 interface
 
-uses Types, SysUtils;
+uses SysUtils;
 
 Type
+  TBytes = Array of Byte;
 
   { TAlphabetEncoder }
   TReverseAlphabet = Array[0..255] of Byte;
@@ -42,7 +43,7 @@ Type
         'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_');
   Private
     FBits : Byte;
-    FAlphabet : TByteDynArray;
+    FAlphabet : TBytes;
     FReverse : TReverseAlphabet;
     FPadding : Integer;
     class var StdEncoders : Array[TStandardEncoder] of TAlphabetEncoder;
@@ -74,7 +75,7 @@ Type
     // Bits per characters
     Property Bits : Byte Read FBits;
     // ASCII value of characters
-    Property Alphabet : TByteDynArray Read FAlphabet;
+    Property Alphabet : TBytes Read FAlphabet;
     // Reverse byte->character map
     Property Reverse : TReverseAlphabet Read FReverse;
     // Bits of padding
diff --git a/packages/rtl-extra/fpmake.pp b/packages/rtl-extra/fpmake.pp
index e01cf860cd..af31c75472 100644
--- a/packages/rtl-extra/fpmake.pp
+++ b/packages/rtl-extra/fpmake.pp
@@ -115,7 +115,6 @@ begin
       end;
 
     T:=P.Targets.AddUnit('objects.pp',ObjectsOSes);
-    T:=P.Targets.AddUnit('basenenc.pp');
 
     T:=P.Targets.AddUnit('printer.pp',PrinterOSes);
     T.Dependencies.AddInclude('printerh.inc',PrinterOSes);