diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index 2a2805a49f0..3878ccd4149 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,7 @@
+2010-05-08  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gcc-interface/decl.c (make_aligning_type): Declare the type.
+
 2010-05-08  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/decl.c (gnat_to_gnu_entity): Create variables for size
diff --git a/gcc/ada/gcc-interface/decl.c b/gcc/ada/gcc-interface/decl.c
index b0334f2c8ed..6df79fb878e 100644
--- a/gcc/ada/gcc-interface/decl.c
+++ b/gcc/ada/gcc-interface/decl.c
@@ -5955,8 +5955,8 @@ make_aligning_type (tree type, unsigned int align, tree size,
 
   if (TREE_CODE (name) == TYPE_DECL)
     name = DECL_NAME (name);
-
-  TYPE_NAME (record_type) = concat_name (name, "_ALIGN");
+  name = concat_name (name, "ALIGN");
+  TYPE_NAME (record_type) = name;
 
   /* Compute VOFFSET and then POS.  The next byte position multiple of some
      alignment after some address is obtained by "and"ing the alignment minus
@@ -6001,8 +6001,12 @@ make_aligning_type (tree type, unsigned int align, tree size,
 		  size_int (room + align / BITS_PER_UNIT));
 
   SET_TYPE_MODE (record_type, BLKmode);
-
   relate_alias_sets (record_type, type, ALIAS_SET_COPY);
+
+  /* Declare it now since it will never be declared otherwise.  This is
+     necessary to ensure that its subtrees are properly marked.  */
+  create_type_decl (name, record_type, NULL, true, false, Empty);
+
   return record_type;
 }
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 4a18a2b69da..08266b1d434 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2010-05-08  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* gnat.dg/lto4.ad[sb]: New test.
+
 2010-05-08  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gnat.dg/specs/lto3.ads: New test.
diff --git a/gcc/testsuite/gnat.dg/lto4.adb b/gcc/testsuite/gnat.dg/lto4.adb
new file mode 100644
index 00000000000..4e84b1d563d
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/lto4.adb
@@ -0,0 +1,12 @@
+-- { dg-do compile }
+-- { dg-options "-flto" }
+
+package body Lto4 is
+
+   procedure SS_Allocate (Stack : Stack_Ptr) is
+      Chunk : Chunk_Ptr := Stack.Current_Chunk;
+   begin
+      Chunk := new Chunk_Id (First => Chunk.Last, Last  => Chunk.Last);
+   end;
+
+end Lto4;
diff --git a/gcc/testsuite/gnat.dg/lto4.ads b/gcc/testsuite/gnat.dg/lto4.ads
new file mode 100644
index 00000000000..36c9f9464e5
--- /dev/null
+++ b/gcc/testsuite/gnat.dg/lto4.ads
@@ -0,0 +1,26 @@
+with System.Storage_Elements;
+
+package Lto4 is
+
+   package SSE renames System.Storage_Elements;
+
+   type SS_Ptr is new SSE.Integer_Address;
+
+   type Memory is array (SS_Ptr range <>) of SSE.Storage_Element;
+   for Memory'Alignment use Standard'Maximum_Alignment;
+
+   type Chunk_Id (First, Last : SS_Ptr) is record
+      Mem : Memory (First .. Last);
+   end record;
+
+   type Chunk_Ptr is access all Chunk_Id;
+
+   type Stack_Id is record
+      Current_Chunk : Chunk_Ptr;
+   end record;
+
+   type Stack_Ptr is access Stack_Id;
+
+   procedure SS_Allocate (Stack : Stack_Ptr);
+
+end Lto4;