diff --git a/scripts/mk_copyright.py b/scripts/mk_copyright.py
index 730020a38..3651e3819 100644
--- a/scripts/mk_copyright.py
+++ b/scripts/mk_copyright.py
@@ -19,15 +19,15 @@ def has_cr(file):
     lines = 0
     line = ins.readline()
     while line and lines < 20:
-	m = cr.search(line)
-	if m:
-	    ins.close()
-	    return True
-	m = aut.search(line)
-	if m:
-	    ins.close()
-	    return True
-	line = ins.readline()
+        m = cr.search(line)
+        if m:
+            ins.close()
+            return True
+        m = aut.search(line)
+        if m:
+            ins.close()
+            return True
+        line = ins.readline()
     ins.close()
     return False
 
@@ -38,20 +38,20 @@ def add_cr(file):
     ous.write(cr_notice)
     line = ins.readline()
     while line:
-	ous.write(line)
-	line = ins.readline()
+        ous.write(line)
+        line = ins.readline()
     ins.close()
     ous.close()
     os.system("move %s %s" % (tmp, file))
-    
+
 def add_missing_cr(dir):
     for root, dirs, files in os.walk(dir):
-	for f in files:
-	    if f.endswith('.cpp') or f.endswith('.h') or f.endswith('.c') or f.endswith('.cs'):
-		path = "%s\\%s" % (root, f)
-		if not has_cr(path):
-		    print("Missing CR for %s" % path)
-		    add_cr(path)
+        for f in files:
+            if f.endswith('.cpp') or f.endswith('.h') or f.endswith('.c') or f.endswith('.cs'):
+                path = "%s\\%s" % (root, f)
+                if not has_cr(path):
+                    print("Missing CR for %s" % path)
+                    add_cr(path)
 
 add_missing_cr('src')
 add_missing_cr('examples')
diff --git a/scripts/update_header_guards.py b/scripts/update_header_guards.py
index 1010f1899..815196ef3 100644
--- a/scripts/update_header_guards.py
+++ b/scripts/update_header_guards.py
@@ -17,55 +17,55 @@ def fix_hdr(file):
     line = ins.readline()
     found = False
     while line:
-	m = doubleu.search(line)
-	if m:
-	    ous.write("#")
-	    ous.write(m.group(1))
-	    ous.write(" ")
-	    ous.write(m.group(2))
-	    ous.write("_H_\n")
-	    line = ins.readline()
-	    found = True
-	    continue	    
-	m = ifndef.search(line)
-	if m:
-	    print(m.group(1))
-	    ous.write("#ifndef ")
-	    ous.write(m.group(1))
-	    ous.write("_H_\n")
-	    line = ins.readline()
-	    found = True
-	    continue
-	m = defn.search(line)
-	if m:
-	    ous.write("#define ")
-	    ous.write(m.group(1))
-	    ous.write("_H_\n")
-	    line = ins.readline()
-	    found = True
-	    continue
-	m = endif.search(line)
-	if m:
-	    ous.write("#endif /* ")
-	    ous.write(m.group(1))
-	    ous.write("_H_ */\n")
-	    line = ins.readline()
-	    found = True
-	    continue
-	ous.write(line)
-	line = ins.readline()
+        m = doubleu.search(line)
+        if m:
+            ous.write("#")
+            ous.write(m.group(1))
+            ous.write(" ")
+            ous.write(m.group(2))
+            ous.write("_H_\n")
+            line = ins.readline()
+            found = True
+            continue
+        m = ifndef.search(line)
+        if m:
+            print(m.group(1))
+            ous.write("#ifndef ")
+            ous.write(m.group(1))
+            ous.write("_H_\n")
+            line = ins.readline()
+            found = True
+            continue
+        m = defn.search(line)
+        if m:
+            ous.write("#define ")
+            ous.write(m.group(1))
+            ous.write("_H_\n")
+            line = ins.readline()
+            found = True
+            continue
+        m = endif.search(line)
+        if m:
+            ous.write("#endif /* ")
+            ous.write(m.group(1))
+            ous.write("_H_ */\n")
+            line = ins.readline()
+            found = True
+            continue
+        ous.write(line)
+        line = ins.readline()
     ins.close()
     ous.close()
     if found:
-	os.system("move %s %s" % (tmp, file))
+        os.system("move %s %s" % (tmp, file))
     else:
-	os.system("del %s" % tmp)
-    
+        os.system("del %s" % tmp)
+
 def fixup(dir):
     for root, dirs, files in os.walk(dir):
-	for f in files:
-	    if f.endswith('.h'):
-		path = "%s\\%s" % (root, f)
-		fix_hdr(path)
+        for f in files:
+            if f.endswith('.h'):
+                path = "%s\\%s" % (root, f)
+                fix_hdr(path)
 
 fixup('src')