diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c68945b9190..6e6ac9c0c1a 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2009-06-07  Bernhard Reutner-Fischer  <aldot@gcc.gnu.org>
+
+	* basic-block.h (ENTRY_BLOCK, EXIT_BLOCK): Document that neither of
+	them is supposed to hold actual statements.
+
 2009-06-06  Ian Lance Taylor  <iant@google.com>
 
 	* doc/extend.texi (Attribute Syntax): Document that C++ labels on
diff --git a/gcc/basic-block.h b/gcc/basic-block.h
index 901845a686d..72bdf5c6504 100644
--- a/gcc/basic-block.h
+++ b/gcc/basic-block.h
@@ -491,7 +491,8 @@ extern bitmap_obstack reg_obstack;
 #define BB_HEAD(B)      (B)->il.rtl->head_
 #define BB_END(B)       (B)->il.rtl->end_
 
-/* Special block numbers [markers] for entry and exit.  */
+/* Special block numbers [markers] for entry and exit.
+   Neither of them is supposed to hold actual statements.  */
 #define ENTRY_BLOCK (0)
 #define EXIT_BLOCK (1)