diff --git a/gnat/spawn.gpr b/gnat/spawn.gpr
index 2d6f60f..c1825f8 100644
--- a/gnat/spawn.gpr
+++ b/gnat/spawn.gpr
@@ -55,6 +55,7 @@ library project Spawn is
       when "osx" =>
          for Excluded_Source_Files use Common_Excluded &
            ("spawn-windows_api.ads",
+            "spawn-windows_api.adb",
             "spawn-internal-windows.ads",
             "spawn-internal-windows.adb");
    end case;
diff --git a/gnat/spawn_glib.gpr b/gnat/spawn_glib.gpr
index 07df237..87ca1aa 100644
--- a/gnat/spawn_glib.gpr
+++ b/gnat/spawn_glib.gpr
@@ -57,8 +57,8 @@ library project Spawn_Glib is
          for Excluded_Source_Files use Common_Excluded &
            ("spawn-channels__glib_posix.ads",
             "spawn-channels__glib_posix.adb",
-	    "spawn-polls-posix_polls.ads",
-	    "spawn-polls-posix_polls.adb",
+            "spawn-polls-posix_polls.ads",
+            "spawn-polls-posix_polls.adb",
             "pipe2.c",
             "posix_const.c");
    end case;