diff --git a/fmpz_mat/doc/fmpz_mat.txt b/fmpz_mat/doc/fmpz_mat.txt
index 2f07624..d741899 100644
--- a/fmpz_mat/doc/fmpz_mat.txt
+++ b/fmpz_mat/doc/fmpz_mat.txt
@@ -1114,7 +1114,7 @@ void fmpz_mat_gram(fmpz_mat_t B, const fmpz_mat_t A)
 
     Sets \code{B} to the Gram matrix of the $m$-dimensional lattice \code{L} in 
     $n$-dimensional Euclidean space $R^n$ spanned by the rows of
-    the $m$ × $n$ matrix \code{A}. Dimensions must be compatible.
+    the $m \times n$ matrix \code{A}. Dimensions must be compatible.
     \code{A} and \code{B} are allowed to be the same object if \code{A} is a 
     square matrix.
 
