diff --git a/plugins/VOIP/VOIP.pro b/plugins/VOIP/VOIP.pro
index 86a716309..e560a8501 100644
--- a/plugins/VOIP/VOIP.pro
+++ b/plugins/VOIP/VOIP.pro
@@ -24,6 +24,9 @@ linux-* {
 }
 
 win32 {
+	# ffmpeg
+	QMAKE_CXXFLAGS += -D__STDC_CONSTANT_MACROS
+
 	LIBS_DIR = $$PWD/../../../libs
 	LIBS += -L"$$LIBS_DIR/lib/opencv"
 
diff --git a/plugins/VOIP/gui/VideoProcessor.cpp b/plugins/VOIP/gui/VideoProcessor.cpp
index a0084ea18..20aca0410 100644
--- a/plugins/VOIP/gui/VideoProcessor.cpp
+++ b/plugins/VOIP/gui/VideoProcessor.cpp
@@ -10,7 +10,11 @@
 #include "QVideoDevice.h"
 
 #include <math.h>
+#include <time.h>
 
+#if defined(__MINGW32__)
+#define memalign _aligned_malloc
+#endif //MINGW
 
 extern "C" {
 #include <libavcodec/avcodec.h>