diff --git a/tools/lib/provision.py b/tools/lib/provision.py
index 5dbcca7b1f..23dafabb0a 100755
--- a/tools/lib/provision.py
+++ b/tools/lib/provision.py
@@ -160,7 +160,7 @@ COMMON_YUM_DEPENDENCIES = [
 
 BUILD_GROONGA_FROM_SOURCE = False
 BUILD_PGROONGA_FROM_SOURCE = False
-if vendor == "debian" and os_version in ["12"] or vendor == "ubuntu" and os_version in []:
+if vendor == "debian" and os_version in [] or vendor == "ubuntu" and os_version in []:
     # For platforms without a PGroonga release, we need to build it
     # from source.
     BUILD_PGROONGA_FROM_SOURCE = True