diff --git a/lib/spack/docs/build_systems/autotoolspackage.rst b/lib/spack/docs/build_systems/autotoolspackage.rst
index be9833b70ef..479a11b00d3 100644
--- a/lib/spack/docs/build_systems/autotoolspackage.rst
+++ b/lib/spack/docs/build_systems/autotoolspackage.rst
@@ -155,7 +155,7 @@ version, this can be done like so:
 
    @property
    def force_autoreconf(self):
-       return self.version == Version('1.2.3'):
+       return self.version == Version('1.2.3')
 
 ^^^^^^^^^^^^^^^^^^^^^^^
 Finding configure flags