diff --git a/docs/src/performance.md b/docs/src/performance.md
index 3fa2a3826..0449a6fbc 100644
--- a/docs/src/performance.md
+++ b/docs/src/performance.md
@@ -87,17 +87,17 @@ the results are about the same.
 
 ```
 $ time mlr --csv --from cell_towers.csv cut -f radio,mcc,created,updated
-real	1m27.557s
-user	3m8.856s
-sys	0m6.984s
+real    1m27.557s
+user    3m8.856s
+sys     0m6.984s
 
 $ time mlr --csv --from cell_towers.csv.gz --gzin cut -f radio,mcc,created,updated
-real	1m35.121s
-user	3m58.336s
-sys	0m6.591s
+real    1m35.121s
+user    3m58.336s
+sys     0m6.591s
 
 $ time mlr --csv --from cell_towers.csv.gz --prepipe gunzip cut -f radio,mcc,created,updated
-real	1m27.430s
-user	3m18.665s
-sys	0m10.017s
+real    1m27.430s
+user    3m18.665s
+sys     0m10.017s
 ```
diff --git a/docs/src/performance.md.in b/docs/src/performance.md.in
index 03db88882..edc2fa143 100644
--- a/docs/src/performance.md.in
+++ b/docs/src/performance.md.in
@@ -71,17 +71,17 @@ the results are about the same.
 
 ```
 $ time mlr --csv --from cell_towers.csv cut -f radio,mcc,created,updated
-real	1m27.557s
-user	3m8.856s
-sys	0m6.984s
+real    1m27.557s
+user    3m8.856s
+sys     0m6.984s
 
 $ time mlr --csv --from cell_towers.csv.gz --gzin cut -f radio,mcc,created,updated
-real	1m35.121s
-user	3m58.336s
-sys	0m6.591s
+real    1m35.121s
+user    3m58.336s
+sys     0m6.591s
 
 $ time mlr --csv --from cell_towers.csv.gz --prepipe gunzip cut -f radio,mcc,created,updated
-real	1m27.430s
-user	3m18.665s
-sys	0m10.017s
+real    1m27.430s
+user    3m18.665s
+sys     0m10.017s
 ```