--- a/toolkit/library/dependentlibs.py
+++ b/toolkit/library/dependentlibs.py
@@ -98,20 +98,20 @@ def dependentlibs(lib, libpaths, func):
     deps = []
     for dep in func(lib):
         if dep in deps or os.path.isabs(dep):
             continue
         for dir in libpaths:
             deppath = os.path.join(dir, dep)
             if os.path.exists(deppath):
                 deps.extend([d for d in dependentlibs(deppath, libpaths, func) if not d in deps])
-		# Black list the ICU data DLL because preloading it at startup
-		# leads to startup performance problems because of its excessive
-		# size (around 10MB).
-		if not dep.startswith("icudt"):
+                # Black list the ICU data DLL because preloading it at startup
+                # leads to startup performance problems because of its excessive
+                # size (around 10MB).
+                if not dep.startswith("icudt"):
                     deps.append(dep)
                 break
 
     return deps
 
 def main():
     parser = OptionParser()
     parser.add_option("-L", dest="libpaths", action="append", metavar="PATH", help="Add the given path to the library search path")