diff --git a/criu/cr-dedup.c b/criu/cr-dedup.c
index 538f6507c..f1ad9729c 100644
--- a/criu/cr-dedup.c
+++ b/criu/cr-dedup.c
@@ -7,12 +7,12 @@
 #include "pagemap.h"
 #include "restorer.h"
 
-static int cr_dedup_one_pagemap(int pid);
+static int cr_dedup_one_pagemap(int id, int flags);
 
 int cr_dedup(void)
 {
 	int close_ret, ret = 0;
-	int pid;
+	int id;
 	DIR * dirp;
 	struct dirent *ent;
 
@@ -35,10 +35,18 @@ int cr_dedup(void)
 			break;
 		}
 
-		ret = sscanf(ent->d_name, "pagemap-%d.img", &pid);
+		ret = sscanf(ent->d_name, "pagemap-%d.img", &id);
 		if (ret == 1) {
-			pr_info("pid=%d\n", pid);
-			ret = cr_dedup_one_pagemap(pid);
+			pr_info("pid=%d\n", id);
+			ret = cr_dedup_one_pagemap(id, PR_TASK);
+			if (ret < 0)
+				break;
+		}
+
+		ret = sscanf(ent->d_name, "pagemap-shmem-%d.img", &id);
+		if (ret == 1) {
+			pr_info("shmid=%d\n", id);
+			ret = cr_dedup_one_pagemap(id, PR_SHMEM);
 			if (ret < 0)
 				break;
 		}
@@ -58,14 +66,15 @@ err:
 	return 0;
 }
 
-static int cr_dedup_one_pagemap(int pid)
+static int cr_dedup_one_pagemap(int id, int flags)
 {
 	int ret;
 	struct page_read pr;
 	struct page_read * prp;
 	struct iovec iov;
 
-	ret = open_page_read(pid, &pr, PR_TASK | PR_MOD);
+	flags |= PR_MOD;
+	ret = open_page_read(id, &pr, flags);
 	if (ret <= 0) {
 		ret = -1;
 		goto exit;