diff --git a/dl_poly-makefile b/dl_poly-makefile
index 108af4a..8edde2b 100644
--- a/dl_poly-makefile
+++ b/dl_poly-makefile
@@ -1,5 +1,3 @@
-FFLAGS = $(RPM_OPT_FLAGS) -O3 -ffast-math $(NATIVE) -Wno-unused-variable
-
 ifeq ($(PAR),1)
 TYPE = par
 include ../build/MakePAR
diff --git a/dl_poly.spec b/dl_poly.spec
index 91fc329..f4d0319 100644
--- a/dl_poly.spec
+++ b/dl_poly.spec
@@ -18,7 +18,7 @@
 
 Name:		dl_poly
 Version:	1.10
-Release:	5%{?dist}
+Release:	6%{?dist}
 Summary:	General purpose classical molecular dynamics (MD) simulation
 License:	BSD
 URL:		https://gitlab.com/DL_POLY_Classic
@@ -116,7 +116,11 @@ cp %{SOURCE1} source/Makefile
 %else
 %global native NATIVE=
 %endif
-echo %{build_cflags}
+%if 0%{?fedora} >= 32 || 0%{?rhel} >= 9
+%global aam -fallow-argument-mismatch
+%endif
+export FFLAGS="%build_fflags -O3 -ffast-math $(NATIVE) -Wno-unused-variable %{?aam}"
+export LDFLAGS="%build_ldflags"
 # Parallel make fails.  Extra opt flags are from the original.
 %global dobuild \
 mkdir $MPI_COMPILER;\
@@ -200,6 +204,9 @@ desktop-file-install --dir=${RPM_BUILD_ROOT}%{_datadir}/applications %{SOURCE2}
 
 
 %changelog
+* Mon Jan 27 2020 Dave Love <loveshack@fedoraproject.org> - 1.10-6
+- Fix FTBFS with gfortran 10
+
 * Mon Aug 19 2019 Dave love <loveshack@fedoraproject.org> - 1.10-5
 - Update URLs