diff --git a/gazebo/util/Diagnostics.cc b/gazebo/util/Diagnostics.cc
index 5432b247f4..1b3b4dc054 100644
--- a/gazebo/util/Diagnostics.cc
+++ b/gazebo/util/Diagnostics.cc
@@ -26,7 +26,7 @@
 #include "gazebo/util/Diagnostics.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 //////////////////////////////////////////////////
 DiagnosticManager::DiagnosticManager()
diff --git a/gazebo/util/IntrospectionClient.cc b/gazebo/util/IntrospectionClient.cc
index 01239b762c..4998760cf1 100644
--- a/gazebo/util/IntrospectionClient.cc
+++ b/gazebo/util/IntrospectionClient.cc
@@ -30,7 +30,7 @@
 #include "gazebo/util/IntrospectionClientPrivate.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 //////////////////////////////////////////////////
 IntrospectionClient::IntrospectionClient()
diff --git a/gazebo/util/IntrospectionManager.cc b/gazebo/util/IntrospectionManager.cc
index e19439570b..048e605317 100644
--- a/gazebo/util/IntrospectionManager.cc
+++ b/gazebo/util/IntrospectionManager.cc
@@ -30,7 +30,7 @@
 #include "gazebo/util/IntrospectionManagerPrivate.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 //////////////////////////////////////////////////
 IntrospectionManager::IntrospectionManager()
diff --git a/gazebo/util/LogPlay.cc b/gazebo/util/LogPlay.cc
index 9fbde6462a..e0b80b381f 100644
--- a/gazebo/util/LogPlay.cc
+++ b/gazebo/util/LogPlay.cc
@@ -46,7 +46,7 @@
 #include "gazebo/util/LogPlay.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 /////////////////////////////////////////////////
 LogPlay::LogPlay()
diff --git a/gazebo/util/LogRecord.cc b/gazebo/util/LogRecord.cc
index 027b96a313..e1e2543ffc 100644
--- a/gazebo/util/LogRecord.cc
+++ b/gazebo/util/LogRecord.cc
@@ -56,7 +56,7 @@
 #include "gazebo/util/LogRecord.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 //////////////////////////////////////////////////
 LogRecord::LogRecord()
diff --git a/gazebo/util/OpenAL.cc b/gazebo/util/OpenAL.cc
index 04864a73de..faeb2adf32 100644
--- a/gazebo/util/OpenAL.cc
+++ b/gazebo/util/OpenAL.cc
@@ -42,7 +42,7 @@
 #include "gazebo/util/OpenAL.hh"
 
 using namespace gazebo;
-using namespace util;
+using namespace gazebo::util;
 
 #ifdef HAVE_OPENAL
 /////////////////////////////////////////////////