diff --git a/client/Makefile b/client/Makefile
index 0191ff25c..0053d8e58 100644
--- a/client/Makefile
+++ b/client/Makefile
@@ -19,7 +19,7 @@ LUAPLATFORM = generic
 
 ifneq (,$(findstring MINGW,$(platform))) 
     LDLIBS +=  -L/mingw/lib -lgdi32
-	CFLAGS +=  -I/mingw/include
+	CFLAGS +=  -I/mingw/include -D__USE_MINGW_ANSI_STDIO=1
     CXXFLAGS = -I$(QTDIR)/include -I$(QTDIR)/include/QtCore -I$(QTDIR)/include/QtGui
     MOC = $(QTDIR)/bin/moc
     LUAPLATFORM = mingw
diff --git a/client/proxmark3.h b/client/proxmark3.h
index 2c8810420..9b10af1ae 100644
--- a/client/proxmark3.h
+++ b/client/proxmark3.h
@@ -15,7 +15,9 @@
 // Handle platform specific includes
 #ifdef _WIN32
 // for MINGW32 environments
-  #define _USE_32BIT_TIME_T 1
+  #ifndef _USE_32BIT_TIME_T
+    #define _USE_32BIT_TIME_T 1
+  #endif  
   #include <time.h>
   #include <windows.h>
 #else