diff --git a/src/StepFile/FILES b/src/StepFile/FILES
index 028955f57d..9f1052bdd2 100755
--- a/src/StepFile/FILES
+++ b/src/StepFile/FILES
@@ -10,3 +10,6 @@ StepFile_Read.hxx
 StepFile_Transfer.hxx
 stepread.c
 stepread.ph
+step.lex
+step.yacc
+