diff --git a/src/core/main.c b/src/core/main.c
index 561f956f0a5..47a976ad0fe 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1382,7 +1382,7 @@ static int bump_rlimit_memlock(struct rlimit *saved_rlimit) {
 
 static void test_usr(void) {
 
-        /* Check that /usr is not a separate fs */
+        /* Check that /usr is either on the same file system as / or mounted already. */
 
         if (dir_is_empty("/usr") <= 0)
                 return;