diff --git a/Makefile.rule b/Makefile.rule
index c6a0ec0de..6522b0777 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -152,7 +152,7 @@ NO_AFFINITY = 1
 # FUNCTION_PROFILE = 1
 
 # Support for IEEE quad precision(it's *real* REAL*16)( under testing)
-# Thos option should not be used - it is a holdover from unfinished code present
+# This option should not be used - it is a holdover from unfinished code present
 # in the original GotoBLAS2 library that may be usable as a starting point but
 # is not even expected to compile in its present form.
 # QUAD_PRECISION = 1