diff --git a/ra/next/Makefile b/ra/next/Makefile
index 128b6be..cb079fd 100644
--- a/ra/next/Makefile
+++ b/ra/next/Makefile
@@ -1,23 +1,23 @@
 # Basic DocBook mangling makefile. 
 #
 # 
 
 BASENAME=resource-agent-api
-GRAMMAR=ra-api.ng
+GRAMMAR=ra-api.rng
 TEST_FILES=ra-metadata-example-1.0.xml ra-metadata-example.xml
 
 .PHONY: all clean
 
 %.html: %.md
 	pandoc -f markdown -o $@ $^
 
 %.pdf: %.md
 	pandoc -f markdown -o $@ $^
 
 all: $(BASENAME).pdf $(BASENAME).html
 
 clean:
 	rm $(BASENAME).pdf $(BASENAME).html||true
 
 check: $(GRAMMAR) $(TEST_FILES)
 	xmllint --relaxng $(GRAMMAR) --noout $(TEST_FILES)