diff --git a/var/spack/repos/builtin/packages/bacio/package.py b/var/spack/repos/builtin/packages/bacio/package.py
index 5213a39c487..beef149b84a 100644
--- a/var/spack/repos/builtin/packages/bacio/package.py
+++ b/var/spack/repos/builtin/packages/bacio/package.py
@@ -42,4 +42,4 @@ def cmake_args(self):
 
     def patch(self):
         if self.spec.satisfies("@2.4.1"):
-            filter_file(".*", "2.4.1", "VERSION")
+            filter_file(".+", "2.4.1", "VERSION")