diff --git a/ground/openpilotgcs/src/libs/qwt/qwtconfig.pri b/ground/openpilotgcs/src/libs/qwt/qwtconfig.pri
index b9d7538ed..c59b8d2b8 100644
--- a/ground/openpilotgcs/src/libs/qwt/qwtconfig.pri
+++ b/ground/openpilotgcs/src/libs/qwt/qwtconfig.pri
@@ -19,7 +19,7 @@
 #QWT_INSTALL_PREFIX = $$[QT_INSTALL_PREFIX]
 
 unix {
-    QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
+    #QWT_INSTALL_PREFIX    = /usr/local/qwt-$$QWT_VERSION
 }
 
 win32 {
diff --git a/ground/openpilotgcs/src/libs/qwt/src/src.pro b/ground/openpilotgcs/src/libs/qwt/src/src.pro
index 9c9ce2578..a70a9a8ce 100644
--- a/ground/openpilotgcs/src/libs/qwt/src/src.pro
+++ b/ground/openpilotgcs/src/libs/qwt/src/src.pro
@@ -23,6 +23,9 @@ win32|symbian: DEFINES += QT_DLL QWT_DLL QWT_MAKEDLL
 else {
 CONFIG += staticlib
 }
+
+unix:LIBS += -lrt
+
 HEADERS += \
     qwt.h \
     qwt_abstract_scale_draw.h \