diff --git a/lib/spack/spack/build_systems/aspell_dict.py b/lib/spack/spack/build_systems/aspell_dict.py
index 99039fcf287..76b6d8ebc5a 100644
--- a/lib/spack/spack/build_systems/aspell_dict.py
+++ b/lib/spack/spack/build_systems/aspell_dict.py
@@ -39,7 +39,7 @@
 # They aren't really an Autotools package, but it's close enough
 # that this works if we override configure().
 class AspellDictPackage(AutotoolsPackage):
-    """Specialized class for builing aspell dictionairies."""
+    """Specialized class for building aspell dictionairies."""
 
     extends('aspell')