diff --git a/src/test/isolation/isolationtester.c b/src/test/isolation/isolationtester.c
index 2f9fb2d842bc52409032e1ca0352e26503c91e3f..01640124d0c9b44eeebd6286dcf6bc570ae6d610 100644
--- a/src/test/isolation/isolationtester.c
+++ b/src/test/isolation/isolationtester.c
@@ -272,7 +272,7 @@ run_all_permutations(TestSpec * testspec)
 
 	/*
 	 * To generate the permutations, we conceptually put the steps of each
-	 * session on a pile. To generate a permuation, we pick steps from the
+	 * session on a pile. To generate a permutation, we pick steps from the
 	 * piles until all piles are empty. By picking steps from piles in
 	 * different order, we get different permutations.
 	 *