diff --git a/src/ontology/diffs/Makefile b/src/ontology/diffs/Makefile
index ea7384c6a..c2ec34425 100644
--- a/src/ontology/diffs/Makefile
+++ b/src/ontology/diffs/Makefile
@@ -4,9 +4,10 @@ SRC = ../../../$(ONT)-base.obo
 OWLSRC = ../../../$(ONT)-base.owl
 LAST = $(OBO)/$(ONT)/$(ONT)-base.obo
 OWLLAST = $(OBO)/$(ONT)/$(ONT)-base.owl
+REPORTDIR = ../reports
 
 #all: $(ONT)-obo-diff.html $(ONT)-def-diff.html $(ONT)-lastbuild.obo $(ONT)-combined-diff.txt $(ONT)-diff.md
-all: $(ONT)-diff.md
+all: $(ONT)-diff.md $(REPORTDIR)/diff_release_oak.md
 
 $(ONT)-combined-diff.txt: $(ONT)-def-diff.html $(ONT)-obo-diff.html
 	cat $(ONT)-def-diff.txt $(ONT)-obo-diff.txt > $@
@@ -23,3 +24,7 @@ $(ONT)-diff.md: $(ONT)-lastbuild.owl $(OWLSRC)
 $(ONT)-diff.txt: $(ONT)-lastbuild.owl $(OWLSRC)
 	robot diff --labels true -f plain -l $< -r $(OWLSRC) -o $@
 
+$(REPORTDIR)/diff_release_oak.md: $(ONT)-lastbuild.obo
+	runoak -i simpleobo:$(ONT)-lastbuild.obo \
+	       diff -X simpleobo:$(SRC) \
+	            -o $@ --output-type md