--- eclass/qt4-build.eclass
+++ eclass/qt4-build.eclass
@@ -266,7 +266,13 @@
 		CXX='$(tc-getCXX)'\n\
 		CFLAGS='${CFLAGS}'\n\
 		CXXFLAGS='${CXXFLAGS}'\n\
-		LDFLAGS='${LDFLAGS}'\n" \
+		LDFLAGS='${LDFLAGS}'\n\
+		QMakeVar set QMAKE_CXXFLAGS_RELEASE\n\
+		QMakeVar set QMAKE_CXXFLAGS_DEBUG\n\
+		QMakeVar set QMAKE_CFLAGS_RELEASE\n\
+		QMakeVar set QMAKE_CFLAGS_DEBUG\n\
+		QMakeVar set QMAKE_LFLAGS_RELEASE\n\
+		QMakeVar set QMAKE_LFLAGS_DEBUG\n"\
 		-i configure \
 		|| die "sed SYSTEM_VARIABLES failed"