diff --git a/tools/toolchain/scripts/stage3/install_libint.sh b/tools/toolchain/scripts/stage3/install_libint.sh
index d7b087054a..ea1203c13a 100755
--- a/tools/toolchain/scripts/stage3/install_libint.sh
+++ b/tools/toolchain/scripts/stage3/install_libint.sh
@@ -86,6 +86,9 @@ case "$with_libint" in
         --libdir="${pkg_install_dir}/lib" \
         > configure.log 2>&1
 
+      # Fix bug in makefile for Fortran module
+      sed -i "s/\$(CXX) \$(CXXFLAGS)/\$(FC) \$(FCFLAGS)/g" fortran/Makefile
+
       make -j $(get_nprocs) > make.log 2>&1
       make install > install.log 2>&1