1 files changed, 2 insertions, 1 deletions

diff --git a/src/sysstdio.h b/src/sysstdio.h
index 727a466be52..efedc3e450b 100644
--- a/src/sysstdio.h
+++ b/src/sysstdio.h
@@ -28,7 +28,8 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include <attribute.h>
 #include <unlocked-io.h>
 
-extern FILE *emacs_fopen (char const *, char const *) ATTRIBUTE_MALLOC;
+extern FILE *emacs_fopen (char const *, char const *)
+  ATTRIBUTE_MALLOC ATTRIBUTE_DEALLOC (fclose, 1);
 extern void errputc (int);
 extern void errwrite (void const *, ptrdiff_t);
 extern void close_output_streams (void);