diff --git a/server/modules/filter/test/module.cc b/server/modules/filter/test/module.cc
index 39afa671d..ba0bd4c99 100644
--- a/server/modules/filter/test/module.cc
+++ b/server/modules/filter/test/module.cc
@@ -12,6 +12,7 @@
  */
 
 #include "maxscale/module.hh"
+#include <maxscale/alloc.h>
 #include <string>
 #include "../../../core/internal/modules.hh"
 
@@ -38,14 +39,14 @@ Module::ConfigParameters::ConfigParameters(const MXS_MODULE_PARAM* pParams)
         {
             if (this->name == NULL)
             {
-                this->name = const_cast<char*>(pParams->name);
-                this->value = const_cast<char*>(pParams->default_value);
+                this->name = MXS_STRDUP(const_cast<char*>(pParams->name));
+                this->value = MXS_STRDUP(const_cast<char*>(pParams->default_value));
             }
             else
             {
                 MXS_CONFIG_PARAMETER* pNext = new MXS_CONFIG_PARAMETER;
-                pNext->name = const_cast<char*>(pParams->name);
-                pNext->value = const_cast<char*>(pParams->default_value);
+                pNext->name = MXS_STRDUP(const_cast<char*>(pParams->name));
+                pNext->value = MXS_STRDUP(const_cast<char*>(pParams->default_value));
                 pNext->next = NULL;
 
                 pCurrent->next = pNext;
@@ -92,7 +93,7 @@ void Module::ConfigParameters::set_value(const char* zName, const std::string& v
 
         pParam = new MXS_CONFIG_PARAMETER;
         m_values.push_back(zName);
-        pParam->name = const_cast<char*>(m_values.back().c_str());
+        pParam->name = MXS_STRDUP(const_cast<char*>(m_values.back().c_str()));
         pParam->value = NULL;
         pParam->next = NULL;
 
@@ -101,7 +102,7 @@ void Module::ConfigParameters::set_value(const char* zName, const std::string& v
 
     m_values.push_back(value);
 
-    pParam->value = const_cast<char*>(m_values.back().c_str());
+    pParam->value = MXS_STRDUP(const_cast<char*>(m_values.back().c_str()));
 }
 
 const MXS_CONFIG_PARAMETER* Module::ConfigParameters::get_param(const char* zName) const