diff --git a/ncl.spec b/ncl.spec
index 5035dda..1cb18a8 100644
--- a/ncl.spec
+++ b/ncl.spec
@@ -1,4 +1,4 @@
-%if 0%{?fedora} >= 33
+%if 0%{?fedora} >= 33 || 0%{?rhel} >= 9
 %bcond_without flexiblas
 %endif
 %if %{with flexiblas}
@@ -9,7 +9,7 @@
 
 Name:           ncl
 Version:        6.6.2
-Release:        17%{?dist}
+Release:        18%{?dist}
 Summary:        NCAR Command Language and NCAR Graphics
 
 License:        BSD
@@ -184,7 +184,7 @@ sed -i -e 's;load "\$NCARG_ROOT/lib/ncarg/nclex\([^ ;]*\);loadscript(ncargpath("
 #make Build CCOPTIONS="$RPM_OPT_FLAGS -fPIC -Werror-implicit-function-declaration" F77=gfortran F77_LD=gfortran\
 
 FCOPTIONS="$RPM_OPT_FLAGS -fPIC -fno-second-underscore -fno-range-check -fopenmp"
-%if 0%{?fedora} >= 32
+%if 0%{?fedora} >= 32 || 0%{?rhel} >= 9
 FCOPTIONS="$FCOPTIONS -fallow-argument-mismatch -fcommon"
 %endif
 make Build CCOPTIONS="$RPM_OPT_FLAGS -std=c99 -fPIC -fno-strict-aliasing -fopenmp -DACCEPT_USE_OF_DEPRECATED_PROJ_API_H -fcommon" \
@@ -356,6 +356,9 @@ done
 
 
 %changelog
+* Mon Feb  1 2021 Orion Poplawski <orion@nwra.com> - 6.6.2-18
+- Use flexiblas and "-fallow-argument-mismatch -fcommon" on EL9+
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 6.6.2-17
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild