diff --git a/sys/unix/hints/linux-qt5 b/sys/unix/hints/linux-qt5
index 945384baf..8bfbb0252 100644
--- a/sys/unix/hints/linux-qt5
+++ b/sys/unix/hints/linux-qt5
@@ -38,6 +38,8 @@ SYSCFLAGS=-DLUA_USE_POSIX
 LINK=g++
 CXX=g++ -std=gnu++11
 
+QTCXXFLAGS = $(CFLAGS)
+
 WINSRC = $(WINQTSRC)
 WINOBJ = $(WINQTOBJ)
 WINLIB = $(WINQT5LIB)