diff --git a/src/meshlabplugins/filter_func/filter_func.pro b/src/meshlabplugins/filter_func/filter_func.pro
index ef6b654c..7d8d32c8 100644
--- a/src/meshlabplugins/filter_func/filter_func.pro
+++ b/src/meshlabplugins/filter_func/filter_func.pro
@@ -7,9 +7,6 @@ SOURCES       += filter_func.cpp
 TARGET        = filter_func
 
 
-DEFINES += _UNICODE
-INCLUDEPATH += ../../external/muparser_v225/include
-
 # Note: we need static libs so when building muparser lib use 
 # ./configure --enable-shared=no
 
@@ -22,7 +19,7 @@ win32-msvc2013:LIBS += ../../external/lib/win32-msvc2013/muparser.lib
 win32-msvc2015:LIBS += ../../external/lib/win32-msvc2015/muparser.lib
 
 macx:LIBS            += $$MACLIBDIR/libmuparser.a
-linux-g++:LIBS       += $$PWD/../../external/lib/linux-g++/libmuparser.a
-linux-g++-32:LIBS       += $$PWD/../../external/lib/linux-g++-32/libmuparser.a
-linux-g++-64:LIBS       += $$PWD/../../external/lib/linux-g++-64/libmuparser.a
+linux-g++:LIBS       += -lmuparser
+linux-g++-32:LIBS       += -lmuparser
+linux-g++-64:LIBS       += -lmuparser
 win32-g++:LIBS		 += ../../external/lib/win32-gcc/libmuparser.a