diff --git a/include/loki/SafeFormat.h b/include/loki/SafeFormat.h
index e978f36..93e1db5 100644
--- a/include/loki/SafeFormat.h
+++ b/include/loki/SafeFormat.h
@@ -24,6 +24,7 @@
 #include <cstdio>
 #include <climits>
 #include <string>
+#include <string>
 #include <stdexcept>
 #include <utility>
 #include <cassert>
diff --git a/test/CachedFactory/CachedFactoryTest.cpp b/test/CachedFactory/CachedFactoryTest.cpp
index 3b24bfe..c4567fe 100644
--- a/test/CachedFactory/CachedFactoryTest.cpp
+++ b/test/CachedFactory/CachedFactoryTest.cpp
@@ -25,6 +25,7 @@
 
 #include <cassert>
 #include <iostream>
+#include <cstring>
 #include <loki/Factory.h>
 
 #ifdef LOKI_DISABLE_TYPELIST_MACROS
diff --git a/test/RegressionTest/AssocVectorTest.h b/test/RegressionTest/AssocVectorTest.h
index 4532993..59a878a 100644
--- a/test/RegressionTest/AssocVectorTest.h
+++ b/test/RegressionTest/AssocVectorTest.h
@@ -18,6 +18,7 @@
 
 #include <cstdio>
 #include <cstdlib>
+#include <cstring>
 #include <ctime>
 #include <loki/AssocVector.h>
 #include "UnitTest.h"
diff --git a/test/SmartPtr/main.cpp b/test/SmartPtr/main.cpp
index 3f67969..9171842 100644
--- a/test/SmartPtr/main.cpp
+++ b/test/SmartPtr/main.cpp
@@ -18,6 +18,7 @@
 #include <loki/SmartPtr.h>
 
 #include <iostream>
+#include <cstring>
 
 #include "base.h"