diff --git a/testcases/Makefile.PL b/testcases/Makefile.PL
index a7ed5047..eb0f73a4 100755
--- a/testcases/Makefile.PL
+++ b/testcases/Makefile.PL
@@ -10,7 +10,7 @@ WriteMakefile(
         'AnyEvent'     => 0,
         'AnyEvent::I3' => '0.09',
         'X11::XCB'     => '0.03',
-	    'Inline'       => 0,
+        'Inline'       => 0,
     },
     PM => {}, # do not install any files from this directory
     clean => {