1 files changed, 4 insertions, 0 deletions

diff --git a/src/atimer.c b/src/atimer.c
index 70d9bf52bc2..64c9e8ab6cb 100644
--- a/src/atimer.c
+++ b/src/atimer.c
@@ -30,6 +30,10 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 # include <sys/timerfd.h>
 #endif
 
+#ifdef MSDOS
+#include "msdos.h"
+#endif
+
 /* Free-list of atimer structures.  */
 
 static struct atimer *free_atimers;