diff --git a/ChangeLog b/ChangeLog
index 0bcf74831e..09fd4a40a0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2014-05-14  Will Newton  <will.newton@linaro.org>
+
+	* stdlib/gmp-impl.h: Test USE_STACK_ALLOC #ifdef
+	rather than #if.
+
 2014-05-14  Joseph Myers  <joseph@codesourcery.com>
 
 	[BZ #16564]
diff --git a/stdlib/gmp-impl.h b/stdlib/gmp-impl.h
index 83865dc412..b7da5bd44f 100644
--- a/stdlib/gmp-impl.h
+++ b/stdlib/gmp-impl.h
@@ -47,7 +47,7 @@ along with the GNU MP Library; see the file COPYING.LIB.  If not, see
 #endif
 #endif
 
-#if ! defined (HAVE_ALLOCA) || USE_STACK_ALLOC
+#if ! defined (HAVE_ALLOCA) || defined (USE_STACK_ALLOC)
 #include "stack-alloc.h"
 #else
 #define TMP_DECL(m)