diff --git a/zenmap/radialnet/gui/HostsViewer.py b/zenmap/radialnet/gui/HostsViewer.py
index 657acc31c..ac573c4b2 100644
--- a/zenmap/radialnet/gui/HostsViewer.py
+++ b/zenmap/radialnet/gui/HostsViewer.py
@@ -135,7 +135,7 @@ HOSTS_HEADER = ['ID', '#', 'Hosts']
 
 DIMENSION = (700, 400)
 
-IP_RE = '^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$'
+IP_RE = re.compile('^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$')
 
 
 class HostsViewer(BWMainWindow):
@@ -275,8 +275,8 @@ class HostsList(gtk.ScrolledWindow):
         value1 = treemodel.get_value(iter1, 2)
         value2 = treemodel.get_value(iter2, 2)
 
-        value1_is_ip = re.search(IP_RE, value1)
-        value2_is_ip = re.search(IP_RE, value2)
+        value1_is_ip = IP_RE.match(value1)
+        value2_is_ip = IP_RE.match(value2)
 
         if value1_is_ip and value2_is_ip:
             return ipv4_compare(value1, value2)
diff --git a/zenmap/radialnet/util/integration.py b/zenmap/radialnet/util/integration.py
index 8a1c4a39b..ed54475f6 100644
--- a/zenmap/radialnet/util/integration.py
+++ b/zenmap/radialnet/util/integration.py
@@ -124,7 +124,6 @@ from radialnet.gui.RadialNet import NetNode
 import zenmapCore.NmapParser
 
 import math
-import re
 
 
 COLORS = [(0.0, 1.0, 0.0),
diff --git a/zenmap/zenmapCore/NetworkInventory.py b/zenmap/zenmapCore/NetworkInventory.py
index 2c3d326e6..b99b3434b 100644
--- a/zenmap/zenmapCore/NetworkInventory.py
+++ b/zenmap/zenmapCore/NetworkInventory.py
@@ -121,7 +121,6 @@
 # ***************************************************************************/
 
 import os
-import re
 import unittest
 import zenmapCore
 import zenmapCore.NmapParser
diff --git a/zenmap/zenmapCore/NmapCommand.py b/zenmap/zenmapCore/NmapCommand.py
index 99bd65c60..94bbd0d4c 100644
--- a/zenmap/zenmapCore/NmapCommand.py
+++ b/zenmap/zenmapCore/NmapCommand.py
@@ -128,7 +128,6 @@ import errno
 import locale
 import sys
 import os
-import re
 import tempfile
 import unittest
 
diff --git a/zenmap/zenmapCore/NmapParser.py b/zenmap/zenmapCore/NmapParser.py
index b7ee816a2..db2716e94 100644
--- a/zenmap/zenmapCore/NmapParser.py
+++ b/zenmap/zenmapCore/NmapParser.py
@@ -120,7 +120,6 @@
 # *                                                                         *
 # ***************************************************************************/
 
-import re
 import locale
 import os
 import os.path
diff --git a/zenmap/zenmapCore/UmitOptionParser.py b/zenmap/zenmapCore/UmitOptionParser.py
index dce584d6d..b7ac7d458 100644
--- a/zenmap/zenmapCore/UmitOptionParser.py
+++ b/zenmap/zenmapCore/UmitOptionParser.py
@@ -120,8 +120,6 @@
 # *                                                                         *
 # ***************************************************************************/
 
-import re
-
 from optparse import OptionParser
 from zenmapCore.Name import APP_NAME, NMAP_DISPLAY_NAME
 from zenmapCore.Version import VERSION
diff --git a/zenmap/zenmapGUI/ScanInterface.py b/zenmap/zenmapGUI/ScanInterface.py
index f80ba58f6..fca7231d9 100644
--- a/zenmap/zenmapGUI/ScanInterface.py
+++ b/zenmap/zenmapGUI/ScanInterface.py
@@ -124,7 +124,6 @@ import errno
 import gtk
 import gobject
 import os
-import re
 import time
 import xml.sax
 
diff --git a/zenmap/zenmapGUI/ScriptInterface.py b/zenmap/zenmapGUI/ScriptInterface.py
index 1d495aa72..86a2cd2d4 100644
--- a/zenmap/zenmapGUI/ScriptInterface.py
+++ b/zenmap/zenmapGUI/ScriptInterface.py
@@ -125,7 +125,6 @@ import gobject
 import gtk
 import sys
 import tempfile
-import re
 import xml.sax
 
 from zenmapGUI.higwidgets.higwindows import HIGWindow