diff --git a/modules/juce_core/maths/juce_MathsFunctions.h b/modules/juce_core/maths/juce_MathsFunctions.h
index 2ea27ea479..0e83c7a7cd 100644
--- a/modules/juce_core/maths/juce_MathsFunctions.h
+++ b/modules/juce_core/maths/juce_MathsFunctions.h
@@ -376,7 +376,7 @@ bool juce_isfinite (NumericType) noexcept
 template <>
 inline bool juce_isfinite (float value) noexcept
 {
-   #if JUCE_WINDOWS
+   #if JUCE_WINDOWS && ! JUCE_MINGW
     return _finite (value) != 0;
    #else
     return std::isfinite (value);
@@ -386,7 +386,7 @@ inline bool juce_isfinite (float value) noexcept
 template <>
 inline bool juce_isfinite (double value) noexcept
 {
-   #if JUCE_WINDOWS
+   #if JUCE_WINDOWS && ! JUCE_MINGW
     return _finite (value) != 0;
    #else
     return std::isfinite (value);
diff --git a/modules/juce_core/native/juce_BasicNativeHeaders.h b/modules/juce_core/native/juce_BasicNativeHeaders.h
index 9e0b1401bf..034f8518cc 100644
--- a/modules/juce_core/native/juce_BasicNativeHeaders.h
+++ b/modules/juce_core/native/juce_BasicNativeHeaders.h
@@ -113,6 +113,8 @@
 
  #if JUCE_MINGW
   #include <basetyps.h>
+  #include <sys/time.h>
+  #define alloca __builtin_alloca
  #else
   #include <crtdbg.h>
   #include <comutil.h>
diff --git a/modules/juce_core/system/juce_StandardHeader.h b/modules/juce_core/system/juce_StandardHeader.h
index e20cefd0b4..af40d3fc0c 100644
--- a/modules/juce_core/system/juce_StandardHeader.h
+++ b/modules/juce_core/system/juce_StandardHeader.h
@@ -104,6 +104,10 @@
  #pragma warning (pop)
 #endif
 
+#if JUCE_MINGW
+ #include <sys/types.h>
+#endif
+
 #if JUCE_ANDROID
  #include <atomic>
  #include <byteswap.h>
diff --git a/modules/juce_core/time/juce_Time.cpp b/modules/juce_core/time/juce_Time.cpp
index 4952139438..847b360afe 100644
--- a/modules/juce_core/time/juce_Time.cpp
+++ b/modules/juce_core/time/juce_Time.cpp
@@ -62,9 +62,11 @@ namespace TimeHelpers
         }
         else
         {
-            time_t now = static_cast <time_t> (seconds);
+            time_t now = static_cast<time_t> (seconds);
 
-           #if JUCE_WINDOWS
+           #if JUCE_WINDOWS && JUCE_MINGW
+            return *localtime (&now);
+           #elif JUCE_WINDOWS
             if (now >= 0 && now <= 0x793406fff)
                 localtime_s (&result, &now);
             else
@@ -190,7 +192,7 @@ Time& Time::operator= (const Time& other) noexcept
 //==============================================================================
 int64 Time::currentTimeMillis() noexcept
 {
-   #if JUCE_WINDOWS
+   #if JUCE_WINDOWS && ! JUCE_MINGW
     struct _timeb t;
     _ftime_s (&t);
     return ((int64) t.time) * 1000 + t.millitm;