diff --git a/es3/glIsVertexArray.xhtml b/es3/glIsVertexArray.xhtml
index 094e5a6d..b99d825f 100644
--- a/es3/glIsVertexArray.xhtml
+++ b/es3/glIsVertexArray.xhtml
@@ -43,7 +43,7 @@
glIsVertexArray returns GL_TRUE if array is currently the name of a vertex array
object. If array is zero, or if array is not the name of a vertex array object, or if an error
occurs, glIsVertexArray returns GL_FALSE. If array is a name returned by
- glGenVertexArrays, by that has not yet been bound through a call to
+ glGenVertexArrays, but that has not yet been bound through a call to
glBindVertexArray, then the name is not a vertex array object and
glIsVertexArray returns GL_FALSE.