diff --git a/packages/dts/namespaced/Api.Dts.pas b/packages/dts/namespaced/Api.Dts.pas
new file mode 100644
index 0000000000..658e2a756c
--- /dev/null
+++ b/packages/dts/namespaced/Api.Dts.pas
@@ -0,0 +1,3 @@
+unit Api.Dts;
+{$DEFINE FPC_DOTTEDUNITS}
+{$i dts.pas}
diff --git a/packages/dts/namespaces.lst b/packages/dts/namespaces.lst
new file mode 100644
index 0000000000..754713c344
--- /dev/null
+++ b/packages/dts/namespaces.lst
@@ -0,0 +1,3 @@
+src/dts.pas=namespaced/Api.Dts.pas
+{s*:src/}=namespaced/
+{i+:src/}
diff --git a/packages/dts/src/dts.pas b/packages/dts/src/dts.pas
index e7f0b1677b..cfb8d62e20 100644
--- a/packages/dts/src/dts.pas
+++ b/packages/dts/src/dts.pas
@@ -252,15 +252,22 @@ loop on input bytes:
         convert samples to integer and queue to soundcard
 }
 
+{$IFNDEF FPC_DOTTEDUNITS}
 unit dts;
+{$ENDIF FPC_DOTTEDUNITS}
 
 {$mode objfpc}
 {$MINENUMSIZE 4}
 
 interface
 
+{$IFDEF FPC_DOTTEDUNITS}
+uses
+  System.CTypes;
+{$ELSE FPC_DOTTEDUNITS}
 uses
   ctypes;
+{$ENDIF FPC_DOTTEDUNITS}
 
 {$UNDEF LIBA52_DOUBLE}