diff --git a/science/dynare/files/patch-Makefile.am b/science/dynare/files/patch-Makefile.am
new file mode 100644
index 000000000000..e111480f3b87
--- /dev/null
+++ b/science/dynare/files/patch-Makefile.am
@@ -0,0 +1,20 @@
+--- Makefile.am.orig	2021-10-07 22:16:41 UTC
++++ Makefile.am
+@@ -28,7 +28,7 @@ EXTRA_DIST = \
+ 	.dir-locals.el
+ 
+ all-local: preprocessor/src/dynare_m$(EXEEXT)
+-	if file preprocessor/src/dynare_m$(EXEEXT) | grep -q x86.64; then \
++	if file preprocessor/src/dynare_m$(EXEEXT) | grep -q 64-bit; then \
+ 	  ARCH="64"; \
+ 	else \
+ 	  ARCH="32"; \
+@@ -54,7 +54,7 @@ install-exec-local:
+ 	cp -r matlab $(DESTDIR)$(pkglibdir)
+ 	find $(DESTDIR)$(pkglibdir) -name LICENSE.md -delete
+ 	rm -rf $(DESTDIR)$(pkglibdir)/matlab/preprocessor*
+-	if file preprocessor/src/dynare_m | grep -q x86.64; then \
++	if file preprocessor/src/dynare_m | grep -q 64-bit; then \
+ 	  ARCH="64"; \
+ 	else \
+ 	  ARCH="32"; \
diff --git a/science/dynare/files/patch-Makefile.in b/science/dynare/files/patch-Makefile.in
new file mode 100644
index 000000000000..1c019819f32d
--- /dev/null
+++ b/science/dynare/files/patch-Makefile.in
@@ -0,0 +1,20 @@
+--- Makefile.in.orig	2021-10-07 22:16:41 UTC
++++ Makefile.in
+@@ -28,7 +28,7 @@ EXTRA_DIST = \
+ 	.dir-locals.el
+ 
+ all-local: preprocessor/src/dynare_m$(EXEEXT)
+-	if file preprocessor/src/dynare_m$(EXEEXT) | grep -q x86.64; then \
++	if file preprocessor/src/dynare_m$(EXEEXT) | grep -q 64-bit; then \
+ 	  ARCH="64"; \
+ 	else \
+ 	  ARCH="32"; \
+@@ -54,7 +54,7 @@ install-exec-local:
+ 	cp -r matlab $(DESTDIR)$(pkglibdir)
+ 	find $(DESTDIR)$(pkglibdir) -name LICENSE.md -delete
+ 	rm -rf $(DESTDIR)$(pkglibdir)/matlab/preprocessor*
+-	if file preprocessor/src/dynare_m | grep -q x86.64; then \
++	if file preprocessor/src/dynare_m | grep -q 64-bit; then \
+ 	  ARCH="64"; \
+ 	else \
+ 	  ARCH="32"; \