diff --git a/README.md b/README.md
index 0ae51e2..997e1c9 100644
--- a/README.md
+++ b/README.md
@@ -71,11 +71,11 @@ Before using the library in a program, a configuration step is needed. The libra
 
 The three rendering functions are available in fxlib; for monospaced fonts the fourth can be implemented trivially. In gint, the four can be defined as wrappers for `dpixel()`, `dline()`, `dsize()` and `dtext()`.
 
-The type of formulae is `TeX_Flow`. To parse and compute the size of a formula, use the `TeX_parse()` function, which returns a new formula object (or `NULL` if a critical error occurs).
+The type of formulae is `TeX_Env`. To parse and compute the size of a formula, use the `TeX_parse()` function, which returns a new formula object (or `NULL` if a critical error occurs).
 
 ```c
 char *code = "\\frac{x_7}{\\left\\{\\frac{\\frac{2}{3}}{27}\\right\\}^2}";
-struct TeX_Flow *formula = TeX_parse(code);
+struct TeX_Env *formula = TeX_parse(code);
 ```
 
 The size of the formula can be queried through `formula->width` and `formula->height`. To render, specify the location of the top-left corner and the drawing color (which will be passed to all primitives):