diff --git a/t/lib-terminal.sh b/t/lib-terminal.sh
index 51845491bb..cd220e378e 100644
--- a/t/lib-terminal.sh
+++ b/t/lib-terminal.sh
@@ -1,7 +1,7 @@
 # Helpers for terminal output tests.
 
 # Catch tests which should depend on TTY but forgot to. There's no need
-# to aditionally check that the TTY prereq is set here.  If the test declared
+# to additionally check that the TTY prereq is set here.  If the test declared
 # it and we are running the test, then it must have been set.
 test_terminal () {
 	if ! test_declared_prereq TTY