--- src/frame.c
+++ src/frame.c	2012-06-26 16:09:59.692010311 +0000
@@ -21,6 +21,9 @@ along with GNU Emacs.  If not, see <http
 
 #include <stdio.h>
 #include <ctype.h>
+#ifdef STDC_HEADERS
+#include <stdlib.h>
+#endif
 #include <errno.h>
 #include <limits.h>
 #include <setjmp.h>