diff --git a/t-dll.txt b/t-dll.txt
index c7e4e52b1..d810fd43d 100644
--- a/t-dll.txt
+++ b/t-dll.txt
@@ -49,7 +49,7 @@ documentation in the ivl_target.h header file.
 
 * IVL_EX_NUMBER
 
-  This is a constant number. The width is fully know, and the bit
+  This is a constant number. The width is fully known, and the bit
   values are all represented by the ascii characters 0, 1, x or z. The
   ivl_expr_bits method returns a pointer to the least significant bit,
   and the remaining bits are ordered from least significant to most