diff --git a/ChangeLog b/ChangeLog
index 5fb7a5f01..5dc67eeeb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-11-23  Vladimir Serbinenko  <phcoder@gmail.com>
+
+	* INSTALL: Add note about sparc64/ia64 with clang (unsupported).
+
 2013-11-23  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* util/garbage-gen.c: Add missing include of sys/time.h.
diff --git a/INSTALL b/INSTALL
index 62b893d87..e81a095e9 100644
--- a/INSTALL
+++ b/INSTALL
@@ -23,6 +23,10 @@ configuring the GRUB.
 	fail.
   Note: clang 3.4 or later works for powerpc
 	earlier versions suffer from vacopy bug (#15286)
+  Note: clang has no support for generating 64-bit sparc code and hence you
+	can't compile GRUB for sparc64 with clang
+  Note: clang has no support for ia64 and hence you can't compile GRUB
+	for ia64 with clang
 * GNU Make
 * GNU Bison 2.3 or later
 * GNU gettext 0.17 or later