Include lisp.h.

diff --git a/src/atimer.h b/src/atimer.h
index 4a487cdbb30880177e04c62b4d2046ee99b71a81..6411a0ac1504ffcad6139aee7e94c96932c7ddc1 100644 (file)
--- a/src/atimer.h
+++ b/src/atimer.h
@@ -21,6 +21,9 @@ Boston, MA 02111-1307, USA.  */
 #ifndef EMACS_ATIMER_H
 #define EMACS_ATIMER_H
 
+/* Building alloca.o includes us, and we need lisp.h for the P_ macro
+   in that case.  */
+#include "lisp.h"
 #include "systime.h"           /* for EMACS_TIME */
 
 /* Forward declaration.  */