diff --git a/src/main/main.c b/src/main/main.c
index 89a059a6..c1ea79a4 100644
--- a/src/main/main.c
+++ b/src/main/main.c
@@ -54,17 +54,12 @@
 #include "util/file.h"
 #include "util/memdebug.h"
 #include "util/memory.h"
-#include "util/sem.h"
 #include "viewer/dump/dump.h"
 #include "viewer/text/festival.h"
 #include "viewer/text/marks.h"
 
 struct program program;
 int epoll_fd;
-int master_sem = -1;
-int slave_sem = -1;
-int shared_mem_ipc = -1;
-unsigned char *shared_mem = NULL;
 
 static int ac;
 static unsigned char **av;
@@ -112,60 +107,6 @@ check_cwd(void)
 	mem_free_if(cwd);
 }
 
-static void
-init_master_ipc(void)
-{
-	struct string filename;
-	key_t k1, k2, k3;
-
-	if (!get_sun_path(&filename))
-		return;
-	k1 = ftok(filename.source, 1);
-	k2 = ftok(filename.source, 2);
-	k3 = ftok(filename.source, 3);
-	master_sem = sem_create(k1, 0);
-	slave_sem = sem_create(k2, 0);
-	shared_mem_ipc = shmget(k3, 4096, 0600 | IPC_CREAT | IPC_EXCL);
-	if (shared_mem_ipc == -1 && errno == EEXIST)
-		shared_mem_ipc = shmget(k3, 4096, 0600);
-	if (shared_mem_ipc >= 0) {
-		shared_mem = shmat(shared_mem_ipc, NULL, 0);
-	}
-	done_string(&filename);
-}
-
-static void
-init_slave_ipc(void)
-{
-	struct string filename;
-	key_t k1, k2, k3;
-
-	if (!get_sun_path(&filename))
-		return;
-	k1 = ftok(filename.source, 1);
-	k2 = ftok(filename.source, 2);
-	k3 = ftok(filename.source, 3);
-	master_sem = sem_open(k1);
-	slave_sem = sem_open(k2);
-	shared_mem_ipc = shmget(k3, 4096, 0600);
-	if (shared_mem_ipc >= 0) {
-		shared_mem = shmat(shared_mem_ipc, NULL, 0);
-	}
-	done_string(&filename);
-}
-
-static void
-done_ipc(void)
-{
-	if (shared_mem)
-		shmdt(shared_mem);
-	if (master_sem >= 0)
-		sem_close(master_sem);
-	if (slave_sem >= 0)
-		sem_close(slave_sem);
-	/* shared_mem_ipc will be automatically done by sem_close() */
-}
-
 static void
 init(void)
 {
@@ -310,7 +251,6 @@ init(void)
 			handle_trm(get_input_handle(), get_output_handle(),
 				   fd, fd, get_ctl_handle(), info.source, info.length,
 				   remote_session_flags);
-			init_slave_ipc();
 		} else {
 			/* Setup a master terminal */
 			term = attach_terminal(get_input_handle(), get_output_handle(),
@@ -319,8 +259,6 @@ init(void)
 				ERROR(gettext("Unable to attach_terminal()."));
 				program.retval = RET_FATAL;
 				program.terminate = 1;
-			} else {
-				init_master_ipc();
 			}
 		}
 
@@ -339,7 +277,6 @@ static void
 terminate_all_subsystems(void)
 {
 	done_interlink();
-	done_ipc();
 	check_bottom_halves();
 	abort_all_downloads();
 	check_bottom_halves();
diff --git a/src/util/sem.c b/src/util/sem.c
index 51aaa41f..2d8a9554 100644
--- a/src/util/sem.c
+++ b/src/util/sem.c
@@ -28,7 +28,6 @@ or use of these programs.
 
 #include "util/sem.h"
 
-extern int shared_mem_ipc;
 /*
  * Provide an simpler and easier to understand interface to the System V
  * semaphore system calls.  There are 7 routines available to the user:
@@ -227,11 +226,6 @@ sem_rm(int id)
 {
 	semctl(id, 0, IPC_RMID, 0);
 		/* err_sys("can't IPC_RMID"); */
-	/* Stupid, but this is the best place. */
-	if (shared_mem_ipc >= 0) {
-		shmctl(shared_mem_ipc, IPC_RMID, NULL);
-		shared_mem_ipc = -1;
-	}
 }
 
 /****************************************************************************
diff --git a/src/util/sem.h b/src/util/sem.h
index 9d1ba353..509c7d11 100644
--- a/src/util/sem.h
+++ b/src/util/sem.h
@@ -4,7 +4,6 @@
 #include <sys/types.h>
 #include <sys/ipc.h>
 #include <sys/sem.h>
-#include <sys/shm.h>
 
 int sem_create(key_t key, int initval);
 int sem_open(key_t key);