diff --git a/buildutil/tap-driver.sh b/buildutil/tap-driver.sh
index 19aa531d..31aa369b 100755
--- a/buildutil/tap-driver.sh
+++ b/buildutil/tap-driver.sh
@@ -593,7 +593,7 @@ while (1)
           bailout_message = bailout_message " " $0
         testsuite_error(bailout_message)
       }
-    # Maybe we have too look for dianogtic comments too.
+    # Maybe we have too look for diagnostic comments too.
     else if (comments != 0)
       {
         comment = extract_tap_comment($0);