diff --git a/link-grammar/Makefile.am b/link-grammar/Makefile.am
index 895394990..14609b698 100644
--- a/link-grammar/Makefile.am
+++ b/link-grammar/Makefile.am
@@ -87,7 +87,6 @@ dict-common/regex-morph.lo: CFLAGS =
 endif
 
 liblink_grammar_la_SOURCES =        \
-	api.c                            \
 	config.c                         \
 	connectors.c                     \
 	dict-common/dialect.c            \
@@ -142,6 +141,7 @@ liblink_grammar_la_SOURCES =        \
 	print/print-util.c               \
 	print/wcwidth.c                  \
 	resources.c                      \
+	sentence.c                       \
 	string-set.c                     \
 	string-id.c                      \
 	tokenize/anysplit.c              \
diff --git a/link-grammar/api.c b/link-grammar/sentence.c
similarity index 100%
rename from link-grammar/api.c
rename to link-grammar/sentence.c