diff --git a/src/disk.sh b/src/disk.sh
index 907ee5e..32b4760 100644
--- a/src/disk.sh
+++ b/src/disk.sh
@@ -4,7 +4,7 @@ set -Eeuo pipefail
 # Docker environment variables
 
 : "${DISK_IO:="native"}"          # I/O Mode, can be set to 'native', 'threads' or 'io_turing'
-: "${DISK_FMT:=""}"            # Disk file format, can be set to "raw" (default) or "qcow2"
+: "${DISK_FMT:=""}"               # Disk file format, can be set to "raw" (default) or "qcow2"
 : "${DISK_FLAGS:=""}"             # Specifies the options for use with the qcow2 disk format
 : "${DISK_CACHE:="none"}"         # Caching mode, can be set to 'writeback' for better performance
 : "${DISK_DISCARD:="on"}"         # Controls whether unmap (TRIM) commands are passed to the host.