diff --git a/packages/libffi/fpmake.pp b/packages/libffi/fpmake.pp
index 05f232a892..6a41082474 100644
--- a/packages/libffi/fpmake.pp
+++ b/packages/libffi/fpmake.pp
@@ -32,7 +32,7 @@ begin
 
     T:=P.Targets.AddUnit('ffi.pp');
     T:=P.Targets.AddUnit('ffi.manager.pp');
-    T.Dependencies.Add('ffi');
+    T.Dependencies.AddUnit('ffi');
 
     P.ExamplePath.Add('examples');
     P.Targets.AddExampleProgram('simple.pp');