diff --git a/edalize/questaformal.py b/edalize/questaformal.py
index 93ca87e7..8fd313f4 100644
--- a/edalize/questaformal.py
+++ b/edalize/questaformal.py
@@ -108,9 +108,9 @@ def _write_build_rtl_tcl_file(self, tcl_main):
                 cmd = "vcom"
                 if f.file_type.endswith("-87"):
                     args = ["-87"]
-                if f.file_type.endswith("-93"):
+                elif f.file_type.endswith("-93"):
                     args = ["-93"]
-                if f.file_type.endswith("-2008"):
+                elif f.file_type.endswith("-2008"):
                     args = ["-2008"]
                 else:
                     args = []