1 files changed, 6 insertions, 0 deletions

diff --git a/src/alloc.c b/src/alloc.c
index d31cf3b7193..7f0a74ca834 100644
--- a/src/alloc.c
+++ b/src/alloc.c
@@ -48,6 +48,12 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include <verify.h>
 
+#if (defined ENABLE_CHECKING                    \
+     && defined HAVE_VALGRIND_VALGRIND_H        \
+     && !defined USE_VALGRIND)
+# define USE_VALGRIND 1
+#endif
+
 #if USE_VALGRIND
 #include <valgrind/valgrind.h>
 #include <valgrind/memcheck.h>