diff --git a/src/libfsm/print/cdata.c b/src/libfsm/print/cdata.c
index 7ce176c1a..712711e06 100644
--- a/src/libfsm/print/cdata.c
+++ b/src/libfsm/print/cdata.c
@@ -1389,6 +1389,7 @@ fsm_print_cdata(FILE *f,
 	f_free(alloc, config.dst_buf.buf);
 	f_free(alloc, config.endid_buf.buf);
 	f_free(alloc, config.eager_output_buf.buf);
+	f_free(alloc, config.bitset_words.pairs);
 	f_free(alloc, config.state_info);
 
 	return 0;