diff --git a/scripts/shell_completions/bash/borg b/scripts/shell_completions/bash/borg
index 92249cc7e..782c72907 100644
--- a/scripts/shell_completions/bash/borg
+++ b/scripts/shell_completions/bash/borg
@@ -42,8 +42,8 @@ _borg()
 			COMPREPLY=( $(compgen -W "${files_cache_mode}" -- ${cur}) )
 			return 0
 			;;
-		'--compression')
-			local compression_methods="none auto lz4 zlib,1 zlib,2 zlib,3 zlib,4 zlib,5 zlib,6 zlib,7 zlib,8 zlib,9 lzma,0 lzma,1 lzma,2 lzma,3 lzma,4 lzma,5 lzma,6 lzma,7 lzma,8 lzma,9"
+		'--compression' | '-C')
+			local compression_methods="none auto lz4 zstd,1 zstd,2 zstd,3 zstd,4 zstd,5 zstd,6 zstd,7 zstd,8 zstd,9 zstd,10 zstd,11 zstd,12 zstd,13 zstd,14 zstd,15 zstd,16 zstd,17 zstd,18 zstd,19 zstd,20 zstd,21 zstd,22 zlib,1 zlib,2 zlib,3 zlib,4 zlib,5 zlib,6 zlib,7 zlib,8 zlib,9 lzma,0 lzma,1 lzma,2 lzma,3 lzma,4 lzma,5 lzma,6 lzma,7 lzma,8 lzma,9"
 			COMPREPLY=( $(compgen -W "${compression_methods}" -- ${cur}) )
 			return 0
 			;;
diff --git a/scripts/shell_completions/fish/borg.fish b/scripts/shell_completions/fish/borg.fish
index fc143bf04..a0d1d6ca4 100644
--- a/scripts/shell_completions/fish/borg.fish
+++ b/scripts/shell_completions/fish/borg.fish
@@ -112,7 +112,7 @@ complete -c borg -f      -l 'timestamp'             -d 'Set creation TIME (yyyy-
 complete -c borg         -l 'timestamp'             -d 'Set creation time by reference FILE'        -n "__fish_seen_subcommand_from create"
 complete -c borg -f -s c -l 'checkpoint-interval'   -d 'Write checkpoint every N seconds [1800]'    -n "__fish_seen_subcommand_from create"
 complete -c borg -f      -l 'chunker-params'        -d 'Chunker PARAMETERS [19,23,21,4095]'         -n "__fish_seen_subcommand_from create"
-set -l compression_methods "none auto lz4 zlib,1 zlib,2 zlib,3 zlib,4 zlib,5 zlib,6 zlib,7 zlib,8 zlib,9 lzma,0 lzma,1 lzma,2 lzma,3 lzma,4 lzma,5 lzma,6 lzma,7 lzma,8 lzma,9"
+set -l compression_methods "none auto lz4 zstd,1 zstd,2 zstd,3 zstd,4 zstd,5 zstd,6 zstd,7 zstd,8 zstd,9 zstd,10 zstd,11 zstd,12 zstd,13 zstd,14 zstd,15 zstd,16 zstd,17 zstd,18 zstd,19 zstd,20 zstd,21 zstd,22 zlib,1 zlib,2 zlib,3 zlib,4 zlib,5 zlib,6 zlib,7 zlib,8 zlib,9 lzma,0 lzma,1 lzma,2 lzma,3 lzma,4 lzma,5 lzma,6 lzma,7 lzma,8 lzma,9"
 complete -c borg -f -s C -l 'compression'           -d 'Select compression ALGORITHM,LEVEL [lz4]' -a "$compression_methods" -n "__fish_seen_subcommand_from create"
 
 # borg extract options