diff --git a/README.md b/README.md
index f87a4296de..492e971c57 100644
--- a/README.md
+++ b/README.md
@@ -164,6 +164,7 @@ Options are specified with the -D flag.  The allowed options include:
     ARMADILLO_LIBRARY=(/path/to/armadillo/libarmadillo.so): Armadillo library
     BUILD_CLI_EXECUTABLES=(ON/OFF): whether or not to build command-line programs
     BUILD_PYTHON_BINDINGS=(ON/OFF): whether or not to build Python bindings
+    PYTHON_EXECUTABLE:FILEPATH=(/path/to/python_version): path to specific python executable
     BUILD_TESTS=(ON/OFF): whether or not to build tests
     BUILD_SHARED_LIBS=(ON/OFF): compile shared libraries as opposed to
        static libraries