diff --git a/test_problems/spectroscopy/Makefile.in b/test_problems/spectroscopy/Makefile.in
index 80a7f9722..0bfdbe0a8 100644
--- a/test_problems/spectroscopy/Makefile.in
+++ b/test_problems/spectroscopy/Makefile.in
@@ -29,7 +29,7 @@ LINK_OPTIONS = @EXTRA_LINK@
 os_is_win = @OS_IS_WIN@
 
 # Fortran libraries
-FORT_LIBS = @FLIBS@
+FORT_LIBS = #@FLIBS@
 
 # the C++ compiler
 CXX = @CXX@