diff --git a/mkfs.c b/mkfs.c
index cba4f021..d980d4aa 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1335,7 +1335,7 @@ int main(int ac, char **av)
 				break;
 			case 'b':
 				block_count = parse_size(optarg);
-				if (block_count <= 1024*1024*1024) {
+				if (block_count <= BTRFS_MKFS_SMALL_VOLUME_SIZE) {
 					fprintf(stdout,
 				"SMALL VOLUME: forcing mixed metadata/data groups\n");
 					mixed = 1;
diff --git a/utils.c b/utils.c
index f9ad946e..87424fe4 100644
--- a/utils.c
+++ b/utils.c
@@ -702,7 +702,7 @@ int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
 	if (max_block_count)
 		block_count = min(block_count, max_block_count);
 
-	if (block_count < 1024 * 1024 * 1024 && !(*mixed)) {
+	if (block_count < BTRFS_MKFS_SMALL_VOLUME_SIZE && !(*mixed)) {
 		printf("SMALL VOLUME: forcing mixed metadata/data groups\n");
 		*mixed = 1;
 	}
@@ -2287,7 +2287,7 @@ int is_vol_small(char *file)
 		close(fd);
 		return -1;
 	}
-	if (size < 1024 * 1024 * 1024) {
+	if (size < BTRFS_MKFS_SMALL_VOLUME_SIZE) {
 		close(fd);
 		return 1;
 	} else {
diff --git a/utils.h b/utils.h
index e29ab936..d7d2ad5d 100644
--- a/utils.h
+++ b/utils.h
@@ -24,6 +24,7 @@
 #include <dirent.h>
 
 #define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
+#define BTRFS_MKFS_SMALL_VOLUME_SIZE (1024 * 1024 * 1024)
 
 #define BTRFS_SCAN_PROC		(1ULL << 0)
 #define BTRFS_SCAN_DEV		(1ULL << 1)