diff --git a/src/callproc.c b/src/callproc.c
index 28e6c00377c..bcf990ad127 100644
--- a/src/callproc.c
+++ b/src/callproc.c
@@ -35,7 +35,7 @@ extern char *sys_errlist[];
 #endif /* SIGCLD */
 
 #include <sys/types.h>
-#define PRIO_PROCESS 0
+
 #include <sys/file.h>
 #ifdef USG5
 #include <fcntl.h>
diff --git a/src/emacs.c b/src/emacs.c
index 2e6527e4e7e..309ba1ce2a1 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -52,8 +52,6 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #define O_RDWR 2
 #endif
 
-#define PRIO_PROCESS 0
-
 /* Command line args from shell, as list of strings */
 Lisp_Object Vcommand_line_args;