diff --git a/configure.ac b/configure.ac
index cb7911e..8e41173 100644
--- a/configure.ac
+++ b/configure.ac
@@ -61,6 +61,7 @@
 AC_ARG_VAR(YAML_PATH, [The path to the yaml config files.])
 AS_IF([test "x$YAML_PATH" == "x"], [YAML_PATH="$srcdir"])
 LEDGEN="$PYTHON $srcdir/parse_led.py -d $YAML_PATH"
+AC_SUBST(LEDGEN)
 
 # Create configured output
 AC_CONFIG_FILES([Makefile test/Makefile])