diff --git a/Common/File/FileUtil.cpp b/Common/File/FileUtil.cpp
index d7a09d3069..03cc5a649a 100644
--- a/Common/File/FileUtil.cpp
+++ b/Common/File/FileUtil.cpp
@@ -24,6 +24,12 @@
 
 #include "ppsspp_config.h"
 
+#ifdef __MINGW32__
+#include <unistd.h>
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
+#endif
+#endif
 #include <cstring>
 #include <ctime>
 #include <memory>
diff --git a/Common/TimeUtil.cpp b/Common/TimeUtil.cpp
index 8f0ce379ed..08f48e742a 100644
--- a/Common/TimeUtil.cpp
+++ b/Common/TimeUtil.cpp
@@ -1,6 +1,5 @@
 #include <cstdio>
 #include <cstdint>
-#include <ctime>
 
 #include "ppsspp_config.h"
 
@@ -18,6 +17,7 @@
 #include <sys/time.h>
 #include <unistd.h>
 #endif
+#include <ctime>
 
 static double curtime = 0;
 
diff --git a/Core/Dialog/PSPSaveDialog.cpp b/Core/Dialog/PSPSaveDialog.cpp
index 99fc0bd39b..0253db8283 100755
--- a/Core/Dialog/PSPSaveDialog.cpp
+++ b/Core/Dialog/PSPSaveDialog.cpp
@@ -16,8 +16,11 @@
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
 #ifdef __MINGW32__
+#include <unistd.h>
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
 #define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
 #endif
+#endif
 
 #include <ctime>
 #include <thread>
diff --git a/Core/FileSystems/DirectoryFileSystem.cpp b/Core/FileSystems/DirectoryFileSystem.cpp
index b73634ca35..1cbd075b97 100644
--- a/Core/FileSystems/DirectoryFileSystem.cpp
+++ b/Core/FileSystems/DirectoryFileSystem.cpp
@@ -17,6 +17,13 @@
 
 #include "ppsspp_config.h"
 
+#ifdef __MINGW32__
+#include <unistd.h>
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
+#endif
+#endif
+
 #include <algorithm>
 #include <ctime>
 #include <limits>
diff --git a/Core/FileSystems/VirtualDiscFileSystem.cpp b/Core/FileSystems/VirtualDiscFileSystem.cpp
index 63e78fcbf1..4c1f5c324c 100644
--- a/Core/FileSystems/VirtualDiscFileSystem.cpp
+++ b/Core/FileSystems/VirtualDiscFileSystem.cpp
@@ -16,6 +16,12 @@
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
 #include "ppsspp_config.h"
+#ifdef __MINGW32__
+#include <unistd.h>
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
+#endif
+#endif
 #include <ctime>
 
 #include "Common/File/FileUtil.h"
diff --git a/Core/HLE/sceUsbGps.cpp b/Core/HLE/sceUsbGps.cpp
index 456d09b487..2c9f320044 100644
--- a/Core/HLE/sceUsbGps.cpp
+++ b/Core/HLE/sceUsbGps.cpp
@@ -15,6 +15,9 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#ifdef __MINGW32__
+#include <unistd.h>
+#endif
 #include <ctime>
 
 #include "Common/System/System.h"
diff --git a/Core/Replay.cpp b/Core/Replay.cpp
index fb03eeea4a..eaf1d5a959 100644
--- a/Core/Replay.cpp
+++ b/Core/Replay.cpp
@@ -15,6 +15,13 @@
 // Official git repository and contact information can be found at
 // https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
 
+#ifdef __MINGW32__
+#include <unistd.h>
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#define _POSIX_THREAD_SAFE_FUNCTIONS 200112L
+#endif
+#endif
+
 #include <cstring>
 #include <ctime>
 #include <vector>