diff --git a/var/spack/repos/builtin/packages/tau/package.py b/var/spack/repos/builtin/packages/tau/package.py
index 36f51958382..dff5ce762c9 100644
--- a/var/spack/repos/builtin/packages/tau/package.py
+++ b/var/spack/repos/builtin/packages/tau/package.py
@@ -107,7 +107,7 @@ class Tau(Package):
     conflicts('+adios2', when='@:2.29.1')
     conflicts('+sqlite', when='@:2.29.1')
 
-    patch('unwind.patch', when="@2.29")
+    patch('unwind.patch', when="@2.29.0")
 
     def set_compiler_options(self, spec):