diff --git a/linalg.scad b/linalg.scad
index 66d440a..ae7f7a4 100644
--- a/linalg.scad
+++ b/linalg.scad
@@ -321,7 +321,7 @@ function submatrix_set(M,A,m=0,n=0) =
 // Description:
 //   Constructs a matrix by horizontally "stacking" together compatible matrices or vectors.  Vectors are treated as columsn in the stack.
 //   This command is the inverse of `column`.  Note: strings given in vectors are broken apart into lists of characters.  Strings given
-//   in matrices are preserved as strings.  If you need to combine vectors of strings use {{list_to_matrix}} as shown below to convert the
+//   in matrices are preserved as strings.  If you need to combine vectors of strings use {{list_to_matrix()}} as shown below to convert the
 //   vector into a column matrix.  Also note that vertical stacking can be done directly with concat.  
 // Arguments:
 //   M1 = If given with other arguments, the first matrix (or vector) to stack.  If given alone, a list of matrices/vectors to stack.