ggtern fails to install with ggplot2 3.3.0

[edunivers]

ggtern fails to install with ggplot2 3.3.0 but installs well with ggplot2 3.1.0 in R 3.6

• installing source package ‘ggtern’ ...
  ** package ‘ggtern’ successfully unpacked and MD5 sums checked
  ** using staged installation
  ** R
  ** data
  ** demo
  ** inst
  ** byte-compile and prepare package for lazy loading
  Error in get(x, envir = ns, inherits = FALSE) :
  object 'expand_default' not found
  Error: unable to load R code in package ‘ggtern’
  Execution halted

[georgeblck]

The same problem at installation happened with me on R 3.6.3. Going back to ggplot 3.2.1 with devtools::install_version("ggplot2", version = "3.2.1") made it possible to install ggtern