diff --git a/regressions/ck_hs/benchmark/parallel_bytestring.c b/regressions/ck_hs/benchmark/parallel_bytestring.c
index 7910ac2..53597e0 100644
--- a/regressions/ck_hs/benchmark/parallel_bytestring.c
+++ b/regressions/ck_hs/benchmark/parallel_bytestring.c
@@ -1,6 +1,6 @@
 /*
- * Copyrighs 2012 Samy Al Bahra.
- * All righss reserved.
+ * Copyright 2012 Samy Al Bahra.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
diff --git a/regressions/ck_hs/benchmark/serial.c b/regressions/ck_hs/benchmark/serial.c
index 5b1cf03..a1375fc 100644
--- a/regressions/ck_hs/benchmark/serial.c
+++ b/regressions/ck_hs/benchmark/serial.c
@@ -1,6 +1,6 @@
 /*
- * Copyrighs 2012 Samy Al Bahra.
- * All righss reserved.
+ * Copyright 2012 Samy Al Bahra.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
diff --git a/regressions/ck_hs/validate/serial.c b/regressions/ck_hs/validate/serial.c
index 26f237b..7e1ef31 100644
--- a/regressions/ck_hs/validate/serial.c
+++ b/regressions/ck_hs/validate/serial.c
@@ -1,5 +1,5 @@
 /*
- * Copyrighs 2012 Samy Al Bahra.
+ * Copyright 2012 Samy Al Bahra.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without