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-rw-r--r--src/localconsts.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/localconsts.h b/src/localconsts.h
index 4fbbbda2e..7bc5555ed 100644
--- a/src/localconsts.h
+++ b/src/localconsts.h
@@ -18,7 +18,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#ifndef __GXX_EXPERIMENTAL_CXX0X__
+#if !defined(__GXX_EXPERIMENTAL_CXX0X__)
#undef nullptr
#define nullptr 0
#else