diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index 62367175f26..b19076c7361 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,7 @@
+2015-10-26  Arnaud Charlet  <charlet@adacore.com>
+
+	* debug.adb: Introduce debug flag -gnatd.5.
+
 2015-10-26  Pascal Obry  <obry@adacore.com>
 
 	* s-os_lib.ads, s-os_lib.adb (Kill): New routine. This routine
diff --git a/gcc/ada/debug.adb b/gcc/ada/debug.adb
index 29872b630a0..b38b82b102c 100644
--- a/gcc/ada/debug.adb
+++ b/gcc/ada/debug.adb
@@ -159,7 +159,7 @@ package body Debug is
    --  d.2  Allow statements in declarative part
    --  d.3  Output debugging information from Exp_Unst
    --  d.4
-   --  d.5
+   --  d.5  Do not generate imported subprogram definitions in C code
    --  d.6
    --  d.7
    --  d.8
@@ -762,6 +762,10 @@ package body Debug is
    --  d.3  Output debugging information from Exp_Unst, including the name of
    --       any unreachable subprograms that get deleted.
 
+   --  d.5  By default a subprogram imported generates a subprogram profile.
+   --       This debug flag disables this generation when generating C code,
+   --       assuming a proper #include will be used instead.
+
    ------------------------------------------
    -- Documentation for Binder Debug Flags --
    ------------------------------------------