diff --git a/var/spack/repos/builtin/packages/dealii/package.py b/var/spack/repos/builtin/packages/dealii/package.py
index 2b148da07432786f7825b9ddbaa6d8b492bb6e94..35658c75a0ff0a64ffac1b65bdbaa93ad8a77e86 100644
--- a/var/spack/repos/builtin/packages/dealii/package.py
+++ b/var/spack/repos/builtin/packages/dealii/package.py
@@ -244,8 +244,8 @@ def install(self, spec, prefix):
             print('========= Step-40 Trilinos ==========')
             print('=====================================')
             # change Linear Algebra to Trilinos
-	    # The below filter_file should be different for versions
-	    # before and after 8.4.0
+        # The below filter_file should be different for versions
+        # before and after 8.4.0
             if spec.satisfies('@8.4.0:'):
                 filter_file(r'(\/\/ #define FORCE_USE_OF_TRILINOS.*)',
                             ('#define FORCE_USE_OF_TRILINOS'), 'step-40.cc')
@@ -256,8 +256,8 @@ def install(self, spec, prefix):
                 make('release')
                 make('run', parallel=False)
 
-	    # the rest of the tests on step 40 only works for
-	    # dealii version 8.4.0 and after
+        # the rest of the tests on step 40 only works for
+        # dealii version 8.4.0 and after
             if spec.satisfies('@8.4.0:'):
                 print('=====================================')
                 print('=== Step-40 Trilinos SuperluDist ====')