diff --git a/academic/xfoil/Makefile_patches/Makefile.xfoil.patch b/academic/xfoil/Makefile_patches/Makefile.xfoil.patch
index e8e0b413e3..4fca1643f1 100644
--- a/academic/xfoil/Makefile_patches/Makefile.xfoil.patch
+++ b/academic/xfoil/Makefile_patches/Makefile.xfoil.patch
@@ -105,7 +105,7 @@
  FC = gfortran
  CHK = 
 -CHK = -fbounds-check -finit-real=inf -ffpe-trap=invalid,zero
-+#CHK = -fbounds-check -finit-real=inf -ffpe-trap=invalid,zero,denormal
++CHK = -std=legacy
  DBL = -fdefault-real-8
 -FFLAGS = -O $(CHK) $(DBL)
 -FFLOPT = -O $(CHK) $(DBL)