diff --git a/backends/libpurple/main.cpp b/backends/libpurple/main.cpp
index 39c53627..8defa6b9 100644
--- a/backends/libpurple/main.cpp
+++ b/backends/libpurple/main.cpp
@@ -24,6 +24,11 @@
 #include <event.h>
 #endif
 
+#ifdef WIN32
+#include <process.h>
+#define getpid _getpid
+#endif
+
 using namespace log4cxx;
 
 static LoggerPtr logger_libpurple = log4cxx::Logger::getLogger("libpurple");
diff --git a/plugin/cpp/networkplugin.cpp b/plugin/cpp/networkplugin.cpp
index 94fc82c0..1b7f448c 100644
--- a/plugin/cpp/networkplugin.cpp
+++ b/plugin/cpp/networkplugin.cpp
@@ -28,6 +28,8 @@
 #else 
 #include <winsock2.h>
 #include <stdint.h>
+#include <process.h>
+#define getpid _getpid
 #endif
 
 using namespace log4cxx;
diff --git a/src/logging.cpp b/src/logging.cpp
index 19dee6cf..dfc3f447 100644
--- a/src/logging.cpp
+++ b/src/logging.cpp
@@ -43,6 +43,8 @@
 #include "libgen.h"
 #else
 #include <windows.h>
+#include <process.h>
+#define getpid _getpid
 #endif
 
 using namespace boost::filesystem;