diff --git a/Grow.c b/Grow.c
index 0f9e89b..80176e3 100644
--- a/Grow.c
+++ b/Grow.c
@@ -359,6 +359,12 @@ int Grow_addbitmap(char *devname, int fd, struct context *c, struct shape *s)
 
 		ncopies = (array.layout & 255) * ((array.layout >> 8) & 255);
 		bitmapsize = bitmapsize * array.raid_disks / ncopies;
+
+		if (strcmp(s->bitmap_file, "clustered") == 0 &&
+		    !is_near_layout_10(array.layout)) {
+			pr_err("only near layout is supported with clustered raid10\n");
+			return 1;
+		}
 	}
 
 	st = super_by_fd(fd, &subarray);
diff --git a/mdadm.c b/mdadm.c
index 7cdcdba..87cb33f 100644
--- a/mdadm.c
+++ b/mdadm.c
@@ -1542,8 +1542,13 @@ int main(int argc, char *argv[])
 				break;
 			}
 
-			if (s.level != 1) {
-				pr_err("--bitmap=clustered is currently supported with RAID mirror only\n");
+			if (s.level != 1 && s.level != 10) {
+				pr_err("--bitmap=clustered is currently supported with raid1/10 only\n");
+				rv = 1;
+				break;
+			}
+			if (s.level == 10 && !is_near_layout_10(s.layout)) {
+				pr_err("only near layout is supported with clustered raid10\n");
 				rv = 1;
 				break;
 			}
diff --git a/mdadm.h b/mdadm.h
index 85947bf..3cbf82f 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -1434,6 +1434,7 @@ extern int get_linux_version(void);
 extern int mdadm_version(char *version);
 extern unsigned long long parse_size(char *size);
 extern int parse_uuid(char *str, int uuid[4]);
+extern int is_near_layout_10(int layout);
 extern int parse_layout_10(char *layout);
 extern int parse_layout_faulty(char *layout);
 extern long parse_num(char *num);
diff --git a/util.c b/util.c
index c11729e..543ec6c 100644
--- a/util.c
+++ b/util.c
@@ -397,6 +397,17 @@ unsigned long long parse_size(char *size)
 	return s;
 }
 
+int is_near_layout_10(int layout)
+{
+	int fc, fo;
+
+	fc = (layout >> 8) & 255;
+	fo = layout & (1 << 16);
+	if (fc > 1 || fo > 0)
+		return 0;
+	return 1;
+}
+
 int parse_layout_10(char *layout)
 {
 	int copies, rv;