diff --git a/dumux/io/gnuplotinterface.hh b/dumux/io/gnuplotinterface.hh
index 7e16233d66879a376458a1445ea9010f0aa363fc..99d923c60f71d001d553bef4e086a24c4fd49cab 100644
--- a/dumux/io/gnuplotinterface.hh
+++ b/dumux/io/gnuplotinterface.hh
@@ -27,8 +27,9 @@
  */
 
 #ifndef HAVE_GNUPLOT
-#warning Gnuplot has not been found or cmake has not been used.
-#else
+#warning Gnuplot has not been found by CMake. Defaulting to /usr/bin/gnuplot
+#define GNUPLOT_EXECUTABLE "/usr/bin/gnuplot"
+#endif
 
 #ifndef DUMUX_GNUPLOT_INTERFACE_HH
 #define DUMUX_GNUPLOT_INTERFACE_HH
@@ -293,5 +294,3 @@ private:
 };
 } // end of namespace
 #endif // DUMUX_GNUPLOT_INTERFACE_HH
-
-#endif // HAVE_GNUPLOT
\ No newline at end of file
diff --git a/test/io/gnuplotinterface/Makefile.am b/test/io/gnuplotinterface/Makefile.am
index 1378cb754c2398bd590e62cb642cee983e48a54a..86daf155b002c86e50643632d7ff2e67dda75217 100644
--- a/test/io/gnuplotinterface/Makefile.am
+++ b/test/io/gnuplotinterface/Makefile.am
@@ -1,6 +1,6 @@
 check_PROGRAMS = test_gnuplotinterface
 
-test_fluidsystems_SOURCES = test_gnuplotinterface.cc
+test_gnuplotinterface_SOURCES = test_gnuplotinterface.cc
 
 EXTRA_DIST=CMakeLists.txt
 noinst_HEADERS:=$(wildcard *.hh)