diff --git a/mkspecs/unsupported/win32-g++-cross/qmake.conf b/mkspecs/unsupported/win32-g++-cross/qmake.conf
index d7e0e2de81..e057af2777 100644
--- a/mkspecs/unsupported/win32-g++-cross/qmake.conf
+++ b/mkspecs/unsupported/win32-g++-cross/qmake.conf
@@ -26,6 +26,15 @@ QMAKE_CFLAGS_WARN_OFF	= -w
 QMAKE_CFLAGS_RELEASE	= -O2
 QMAKE_CFLAGS_DEBUG	= -g
 QMAKE_CFLAGS_YACC	= -Wno-unused -Wno-parentheses
+QMAKE_CFLAGS_SSE2       = -msse2
+QMAKE_CFLAGS_SSE3       = -msse3
+QMAKE_CFLAGS_SSSE3      = -mssse3
+QMAKE_CFLAGS_SSE4_1     = -msse4.1
+QMAKE_CFLAGS_SSE4_2     = -msse4.2
+QMAKE_CFLAGS_AVX        = -mavx
+QMAKE_CFLAGS_AVX2       = -mavx2
+QMAKE_CFLAGS_IWMMXT     = -mcpu=iwmmxt
+QMAKE_CFLAGS_NEON       = -mfpu=neon
 
 QMAKE_CXX		= i686-pc-mingw32-g++
 QMAKE_CXXFLAGS		= $$QMAKE_CFLAGS